Call Smart Watch Fitness Tracker VO424 Bracelet Smart Watch

Smart Watch Fitness Tracker VO424 Bracelet Smart Watch

1. Product Identity & Target End Users

The VO424 is an ultra-thin square fitness-focused smart watch designed for daily workout and lifestyle scenarios. It features a practical physical rotary knob for precise manual control, paired with complete Bluetooth communication and full-range health monitoring functions, balancing lightweight wearing comfort and comprehensive smart performance.

All technical parameters displayed on this page originate from standardized laboratory tests without exaggerated marketing claims. This model serves dual retail fitness users and global B2B private-label wholesale clients.

1. Retail end users: Daily fitness enthusiasts, sports beginners and ordinary consumers who pursue slim watch design, convenient one-knob operation, hands-free calling and accurate daily health tracking.

2. B2B wholesale clients: Cross-border distributors and wearable brands sourcing cost-effective square fitness smart watches for daily sports and lifestyle product lines.

VO357 Square Fitness Watch | VO478 Multi-Sport Tracker Watch

ISO 22810:2010 Waterproof Standard Reference

2. Core Hardware Specifications

2.1 Display & Ultra-Thin Body Design

- Screen: High-definition square full-touch display with clear visual presentation, optimized for daily fitness data viewing and operation

- Exclusive hardware: Custom physical rotary function knob, supporting fast menu zooming and one-click watch face switching for efficient sports operation

- Body thickness: 10.1 mm ultra-slim streamlined structure, reducing wrist burden for long-time sports and daily wear

- Net weight: 28 g (excluding straps) to achieve lightweight zero-pressure wearing experience

- Standard strap: Skin-friendly soft silicone sports strap with sweat-resistant and replaceable design, adapting to all fitness and daily scenarios

- Functional limitation: Custom metal and leather straps do not support waterproof performance. Replace with original silicone straps before water exposure to prevent internal hardware damage.

2.2 Connectivity & Core Functional Configuration

- Transmission: Stable low-power BLE Bluetooth module for long-term low-energy smartphone pairing and offline data synchronization

- Supported operating systems: Android 8.0 or newer, iOS 9.0 or newer, fully compatible with mainstream mobile devices

- Audio hardware: Built-in high-sensitivity microphone and speaker to support clear two-way Bluetooth calling and hands-free AI voice assistant control

- Offline storage: Onboard flash memory independently stores sport logs, health data and call records without real-time phone connection

- GPS limitation: No standalone GPS chip. Outdoor sport route recording fully relies on paired mobile phone GPS signals via the supporting APP.

2.3 Power Supply & Battery Endurance

- Battery specification: High-density lithium polymer battery with low-power operation optimization for daily fitness use

- Charging method: Magnetic pogo-pin contact charging for fast, stable and labor-free power replenishment

- Standard input requirement: 5V/1A universal USB power adapter

- Full charging cycle: 2 continuous hours under standard 25℃ laboratory environment

- Lab-tested runtime: Up to 7 days of stable mixed daily usage with moderate function activation

- Runtime note: Actual battery life varies with Bluetooth call frequency, screen brightness adjustment, daily notification volume and continuous sensor monitoring duration.

- Circuit protection: Built-in overcharge and over-discharge protection mechanism to prevent battery damage and extend long-term service life.

2.4 3ATM Waterproof Performance (ISO 22810:2010 Standard)

The VO424 adopts professional 3ATM waterproof grade certified by ISO 22810:2010 international standard, effectively resisting daily sweat erosion, handwashing splashes and short-term shallow pool water contact for daily fitness scenarios.

The following improper usages will cause irreversible internal structural damage and void official factory warranty: Diving, snorkeling, high-pressure water flushing, long-time swimming, hot water bathing and sauna steam exposure.

Internal rubber sealing gaskets will naturally age with long-term daily wear, gradually weakening waterproof protective performance over time.

3. Biometric Sensors & Fitness Health Monitoring

Disclaimer: All health monitoring data including heart rate, SpO2 and sleep cycle records are consumer-level reference data only. This wearable device is not certified medical equipment and cannot be used for clinical diagnosis, disease screening or medical treatment guidance. Users with persistent physical discomfort or abnormal vital signs must consult licensed professional medical practitioners in time.

Monitoring accuracy is affected by wrist wearing tightness, arm hair density, wrist tattoos and ambient temperature. The watch achieves over 97% heart rate detection accuracy under standard laboratory test conditions.

3.1 All-Day Vital Sign Tracking

- 24-hour real-time automatic heart rate monitoring with customizable abnormal heart rate vibration alert thresholds

- Intermittent SpO2 blood oxygen detection to reflect real-time physical fatigue and blood oxygen saturation during daily fitness training

- Multi-stage sleep cycle analysis, accurately recording light sleep, deep sleep and rest status to evaluate daily sleep quality

- Intelligent silent mode: All health reminders and message notifications automatically mute during detected sleep periods to avoid nighttime disturbance

3.2 Multi-Mode Fitness & Sports Recording

Equipped with a high-sensitivity built-in acceleration sensor, the VO424 supports multiple preset professional indoor and outdoor sport modes, covering core scenarios such as running, cycling and swimming.

It automatically records key fitness data including real-time step count, continuous workout duration and accurate calorie consumption for each training session. Outdoor movement tracks can be synchronously generated and viewed via paired smartphone GPS in the supporting APP.

4. Intelligent Communication & Daily Assistant Functions

4.1 Core Smart Communication Features

- Two-way Bluetooth calling: Supports convenient hands-free dialing, answering and call record viewing during sports and daily activities

- AI voice assistant: Enables one-click voice control for weather inquiry, music playback and daily life operation assistance

- Full message synchronization: Vibration reminders for SMS and all mainstream third-party social application notifications to avoid missing important information

4.2 Practical Daily Toolkit

- Personalized watch faces: Mass built-in sports-style dials, supporting custom picture watch face uploads via the paired APP

- Multi-functional tools: Remote camera shooting control, music playback control, multi-group configurable alarms, sedentary reminders, phone finding function and precise countdown timer

4.3 Multi-Language Supporting APP Ecosystem

All offline stored sport data and health records automatically synchronize to the dedicated multi-language wellness APP after Bluetooth reconnection. Core functions include real-time bidirectional data sync, weekly and monthly physical trend analysis dashboards, long-term cloud data backup and personalized function parameter adjustment.

5. B2B OEM & ODM Private-Label Customization Program

5.1 Tiered Minimum Order Quantities

1. Case laser or silk-screen brand logo engraving: 100 units for small-batch trial customization

2. Standard white-label retail packaging customization: 300–500 units per production batch

3. Full OEM service (appearance modification, firmware tuning, standard APP UI rebranding): 1,000 units

4. Deep ODM development (rotary knob logic calibration, sensor parameter tuning and exclusive branded APP): 3,000 units

5.2 Optional Customizable Items

- Visual customization: Exclusive watch case and sports strap color matching, custom fitness-style gift box printing, personalized startup boot animation design

- Firmware customization: Adjustable rotary knob operation logic, heart rate & SpO2 alert thresholds, vibration intensity and sport mode parameter modification

- Software customization: Full white-label APP UI redesign, independent brand exclusive cloud data storage system

- Document customization: Branded user manuals and customized export certification label materials

5.3 Standard Production Lead Times

- Regular prototype sample order: 10–15 working days

- Expedited fast-track sample production: 7 working days

- Mass OEM bulk production orders: 30–45 working days after deposit confirmation and artwork final approval

- Deep customized ODM projects: 45–60 working days

5.4 Global Export Compliance Certifications

All bulk shipment batches are equipped with complete official qualification certificates: CE RED, FCC, RoHS, REACH, GCC, WEEE and ISO9001. Complete certification documents ensure smooth cross-border customs clearance without additional third-party re-inspection. All Bluetooth SIG BQB related content is completely removed from the page.

5.5 Intellectual Property Protection

All customized appearance designs, rotary knob control logic, sport sensor parameters and exclusive APP intellectual property rights fully belong to the purchasing client. Formal NDA confidentiality agreements are provided for all OEM/ODM projects to prevent technical and design data leakage.

6. Factory QC Standards & Limited Hardware Warranty

6.1 Four-Stage Pre-Shipment Inspection System

Every VO424 finished product undergoes strict professional laboratory aging testing before delivery. The inspection scope includes sports strap durability testing, 3ATM waterproof aging calibration, Bluetooth call stability testing, rotary knob operation sensitivity testing, multi-sensor precision verification and battery cycle aging load testing. The mass production hardware defect rate is stably controlled at 0.12%.

6.2 12-Month Global Limited Hardware Warranty

The official 12-month factory warranty covers all manufacturing defects of the watch frame, physical rotary knob component, magnetic charging contacts and internal circuit modules.

Natural wear and tear including surface scratches, paint fading, strap aging, and damage caused by improper water exposure or human misuse are not covered by the warranty scope.

7. Frequently Asked Questions

Q1: What are the advantages of the VO424 fitness smart watch?

It features an ultra-thin lightweight square design, practical physical rotary knob for quick operation, stable Bluetooth calling, multi-sport tracking modes and standard 3ATM waterproof performance, perfectly fitting daily fitness and casual wearing scenarios.

Q2: Can the VO424 be used for daily swimming workouts?

The 3ATM waterproof rating supports daily sweat resistance, splashes and short-term shallow water contact. It is not suitable for long-time swimming, diving, hot water bathing and sauna, which will damage the internal sealing structure and sensors.

Q3: How accurate is the fitness tracking data of VO424?

Equipped with high-sensitivity sensors, the watch tracks heart rate, blood oxygen, sleep and calorie consumption in real time with over 97% lab-tested accuracy, providing reliable daily fitness reference data for users.

Q4: What custom services are available for fitness brand bulk orders?

We provide one-stop private-label customization including logo engraving, sports-style appearance matching, packaging upgrading, rotary knob & sensor firmware tuning and exclusive branded APP development with NDA confidentiality protection.

VOSITONE Smart Watch General Technical Specifications

Product Dimensions & Weight

All measurements derive from VOSITONE Lab testing data. To begin with, the watch boasts an ultra-slim profile, measuring precisely 10.1mm at its thinnest point (measured from phone surface to shell, excluding sensor area). Furthermore, its lightweight construction weighs merely 28g without the strap. However, it's important to note that final product weight may vary slightly. This variation occurs primarily because of different configurations. Additionally, manufacturing processes significantly affect final measurements. Moreover, different measurement methods may yield slightly different results.

Product Visual Representation

While product images and screen contents are shown for illustrative purposes, several important considerations apply. First and foremost, actual product appearance may differ in terms of color, size, and finish. Similarly, screen displays may vary regarding backgrounds, UI elements, and images. Most importantly, all watch face designs represent original artistic creations. Consequently, full copyright belongs exclusively to VOSITONE.

Health Monitoring Features

Heart Rate Accuracy

Lab tests demonstrate exceptional performance. Specifically, accuracy exceeds 97% at 10bpm. The testing covered numerous scenarios including, but not limited to, sedentary activities like sitting and reading, as well as various exercises such as treadmill use, running, walking, and cycling. Nevertheless, actual accuracy may vary due to several factors. Primarily, individual physiological differences play a role. Additionally, usage habits and patterns affect results. Finally, environmental conditions can influence measurements.

Blood Oxygen Monitoring

SpO2 measurements effectively track oxygen saturation levels. Essentially, this measures the percentage of oxygen-carrying hemoglobin in the blood. The system provides intermittent periodic readings rather than continuous monitoring. For optimal results, users should wear the watch snugly and properly. Moreover, keeping the arm steady during measurements improves accuracy. However, multiple factors can affect readings, including low blood perfusion, arm hair, tattoos, improper positioning, and cold temperatures.

Key operational notes include:

• Users must first enable automatic detection in the app
• When oxygen levels drop below the set threshold, the watch provides vibration alerts
• However, these alerts remain disabled during sleep periods

Medical Disclaimer

This product serves exclusively for health management purposes. Importantly, it is not classified as a medical device. All provided data serves merely for reference. Specifically, the information is not intended for medical diagnosis. Therefore, it should never serve as a basis for treatment decisions. For any medical concerns, users should always consult qualified healthcare professionals.

GPS Functionality(If Applicable)

The watch offers robust positioning features. In particular, it supports detailed GPS tracking through the companion app. Laboratory tests have thoroughly validated this performance. However, real-world performance depends on several factors. Environmental conditions represent a primary consideration. Similarly, individual usage habits affect results. Finally, signal interference can impact accuracy.

Water Resistance

The watch meets specific water protection standards. Specifically, it carries a 3ATM rating (30m per ISO 22810:2010). Accordingly, it's suitable for pool and shallow water activities. However, important restrictions apply. The device is not suitable for diving or snorkeling. Users should also avoid high-pressure water exposure. Furthermore, metal and leather straps lack waterproofing.

Critical notes regarding water resistance:

• Protection degrades gradually over time
• Therefore, users should consider alternative straps for swimming
• Additionally, regular inspection of seals is recommended

Charging & Battery Performance

Charging Requirements

Laboratory testing established these specifications at 25°C with 45-80% relative humidity. The device requires a minimum 5V/1A charger. Moreover, it performs best with original charging accessories. However, actual performance may vary due to several factors. Product differences represent one consideration. Similarly, usage patterns affect charging efficiency. Finally, environmental conditions play a role.

Battery Life Estimates

The typical usage scenario includes:

• 120 minutes of Bluetooth calls weekly
• 120 minutes of music playback weekly
• Continuous heart rate monitoring
• 90 minutes of GPS workouts weekly
• Daily notifications
• 200 screen activations daily

Notably, standalone GPS mode operates with separate runtime. Ultimately, actual battery life depends entirely on individual usage patterns and conditions.

System Requirements

The watch requires minimum supported versions:

• Android 8.0 or higher
• iOS 9.0 or higher
  Before purchasing, users should carefully verify their device's compatibility.

*Important Health Notice*

All health-related features serve specific purposes. They are designed exclusively for wellness tracking. While they provide valuable personal health insights, they are not intended for medical diagnosis. Consequently, they should never be used for treatment purposes. For any medical concerns, users must consult qualified healthcare professionals.

All specifications derive from VOSITONE Lab controlled testing. However, real-world performance may vary significantly based on usage conditions and individual factors.

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