FAQs

The minimum order quantity varies depending on the product. Please contact us for detailed MOQ information.

Yes, we offer full customization for design, packaging, and product features to meet your brand’s needs.

Send us an email that specifies item, quantity, color and more.

Yes, we offer a comprehensive SDK for Android and iOS to allow partners to build custom apps and solutions.

MOQ varies based on customization level and hardware complexity. Please contact our sales team for a detailed quote.

Yes, we offer white label App templates that can be quickly branded for faster market entry.

Our in-house R&D team provides full firmware customization for specific sensor or algorithm requirements.

We are a vertically integrated factory and supplier, offering end-to-end R&D to mass production.

Yes, we offer full ODM support, including industrial design, structure, and PCB layout services.

Yes, we offer evaluation samples to qualified B2B partners to verify data accuracy.

The lead time typically ranges from 6 to 8 weeks, depending on the complexity of the order.

The device provides real-time heart rate data, including resting heart rate and active heart rate. You can refer to the app for personalized insights based on age, activity level, and health status.

The wearable is intended for monitoring and early detection of health issues, not for formal diagnosis. Always consult a healthcare provider for diagnosis.

Yes, B2B partners can request access to raw HR, PPG, and motion data for advanced AI analytics.

If your device is under warranty, please reach out to our support team to initiate a replacement or repair process.

Support OTA via BT

Yes, Youhong Medical provides regular firmware updates. You can download them from our official website or receive them via our app.

A smart ring is a compact, wearable device designed in the shape of a ring that uses advanced sensors and algorithms to track health, fitness, and lifestyle data. Despite its small size, a smart ring can monitor many of the same metrics as a smartwatch — but in a more discreet and comfortable form.

Depending on the model, a smart ring can track:Heart rate (HR),Heart rate variability (HRV), Blood oxygen (SpO₂),Sleep stages (deep, light, REM),Stress and recovery levels,Activity and steps,Skin temperature trends,Women’s cycle insights,Non-invasive glucose trend / metabolic indicators (advanced models).Smart rings use optical sensors, motion sensors, and AI data analysis to generate insights into daily health and wellness.

Smart rings benefit a wide range of users:Consumers tracking daily wellness,Athletes monitoring recovery,People managing sleep quality,Companies running corporate wellness programs,Healthcare providers offering remote patient monitoring (RPM),Insurance companies for risk evaluation,Brands launching custom OEM/ODM smart rings.

Smart rings benefit a wide range of users:Consumers tracking daily wellness,Athletes monitoring recovery,People managing sleep quality,Companies running corporate wellness programs,Healthcare providers offering remote patient monitoring (RPM),Insurance companies for risk evaluation,Brands launching custom OEM/ODM smart rings.

Smart rings are popular because they are: 1.Smaller, lighter, and more comfortable 2.Better for sleep tracking 3.More discreet for everyday wear 4.Longer battery life (often 5–10 days) 5.Ideal for 24/7 health monitoring

J-STYLE (Joint Chinese Ltd | Youhong Medical) offers:Medical-grade sensors and algorithms ,24/7 accurate tracking,Up to 10 days battery life,5ATM waterproof design,Optional non-invasive glucose risk assessment,,Full SDK/API integration for digital-health platforms,OEM/ODM customization for global brands. J-STYLE is recognized as one of the leading smart ring manufacturers in China, providing both consumer-ready devices and full-stack B2B solutions.

The “best” smart ring depends on your needs — but for health tracking, remote monitoring, and business partnerships, smart rings from J-STYLE (Joint Chinese Ltd | Youhong Medical) are among the top choices.

The price of a smart ring typically ranges from $80 to $300, depending on the sensors, materials, battery life, and health-tracking features. For B2B customers, J-STYLE offers factory-direct wholesale pricing, with flexible OEM/ODM options based on volume and customization needs.

You can purchase smart rings directly from J-STYLE (Joint Chinese Ltd | Youhong Medical) through our official website or by contacting our sales team for wholesale, OEM/ODM, or private-label orders. We support global shipping and provide full technical documentation, including SDK/API for developers.

Yes. Modern smart rings use medical-grade sensors, optical heart-rate modules, and advanced algorithms to deliver highly accurate health insights. J-STYLE’s smart rings are optimized for daily health, fitness, and wellness tracking.

Most smart rings do not require a subscription. J-STYLE provides free access to core health data and app features, with optional custom data solutions for OEM/ODM partners.

Smart ring battery life typically lasts 5–7 days depending on usage. J-STYLE’s latest models feature ultra-low-power design for extended performance.

Yes. J-STYLE smart rings support 5ATM waterproofing, suitable for hand-washing, sweat, and daily use.

For best accuracy, wear the smart ring on the index finger or middle finger, where blood flow is stronger and sensors perform better.

You can wear it independently, but full data syncing and insights require the mobile app. For enterprise buyers, we support SDK/API for direct system integration.

Yes. Smart rings are lightweight, skin-friendly, and designed for 24/7 wear, even during sleep and workouts.

Yes. Smart rings with temperature and HRV tracking (including J-STYLE models) can support female wellness insights, cycle trends, and stress monitoring.

Smart rings are more discreet, lighter, more comfortable for sleep tracking, and offer better 24/7 wearability. Smart watches provide larger screens and more interactive features.

Common metrics include heart rate, HRV, SpO₂, sleep stages, steps, temperature, stress, and recovery.

Yes. Many smart rings, including J-STYLE models, support continuous SpO₂ monitoring.

Some offer algorithm-based BP trend estimation. J-STYLE supports custom BP algorithm integration for B2B projects.

Yes. They track continuous temperature changes to support sleep, stress, and women’s health insights.

Smart rings are lighter, more comfortable, and better for sleep tracking, while smartwatches offer more screen-based interactions.

Use a magnetic charger or charging dock; full charging takes 60–90 minutes.

Yes. J-STYLE's JCRing smart rings support both platforms with SDK/API available.

Yes. J-STYLE applies encryption and customizable enterprise data-protection protocols.

Absolutely. Rings are ideal for sleep tracking due to minimal interference.

Yes. Stress scores are generated using HRV, HR patterns, sleep quality, and temperature trends.

Yes. They track steps, calories, workouts, and recovery trends.

Yes. They help men track recovery, stress, sleep, and cardiovascular status.

Yes. Temperature + HRV enables cycle prediction and wellness tracking.

Titanium, ceramic, stainless steel, or PC+ABS.

Typically US sizes 6–13.

Use a physical sizing kit or measurement guide.

Yes. Smart rings measure heart rate with optical PPG sensors.

HRV measures stress, recovery, and autonomic nervous system balance.

Smart rings monitor heart patterns but are not medical diagnostic devices.

Yes. They emit extremely low RF levels and meet global safety standards.

Yes. They are durable and suitable for running, gym workouts, and daily activity.

Typically 2–4 years, depending on materials and use.

Yes. J-STYLE supports integrations via SDK and API.

Yes. Smart rings support employee health monitoring and engagement.

Yes. They provide continuous data for chronic disease and telehealth platforms.

Most support single-device pairing; enterprise versions can be customized.

Yes. J-STYLE offers full OEM/ODM, including hardware, software, and algorithms.

Some models do. J-STYLE supports optional NFC depending on project requirements.

Better battery life, comfort, minimal distractions, and higher user adherence.

Yes. Sleep insights help optimize bedtime, recovery, and daily habits.

Yes. HRV-based breathing guidance supports relaxation and mindfulness.

Yes. They offer easy wearability and continuous monitoring for vital signals.

A smart band, or fitness tracker, is a compact, wrist-worn device designed for continuous health and activity monitoring. It typically uses PPG sensors and accelerometers to track key metrics like steps, distance, heart rate (HR), sleep quality, calories burned, and SpO₂. Modern smart bands, such as J-STYLE’s JCVital series, often focus on digital health insights and long battery life.

It uses optical sensors, motion sensors, and Bluetooth to collect health data and sync with a smartphone or backend platform.

Steps, calories, heart rate, SpO₂, sleep, stress, temperature, and workout modes.

High-quality smart bands like J-STYLE use medical-grade sensors and AI algorithms for reliable tracking.

The best smart band offers accuracy, comfort, long battery life, and detailed insights. J-STYLE JCVital is a top choice for OEM/ODM clients.

Prices range from $20–$200 depending on features, materials, and wholesale volume.

You can buy directly from J-STYLE (Joint Chinese Ltd | Youhong Medical) for wholesale, OEM, and ODM orders.

Yes. Most models offer 24/7 heart rate monitoring.

It continuously tracks HR, HRV, SpO₂, sleep stages, and daily activity. Its focus is on high-accuracy digital health data acquisition.

We use multi-channel PPG sensors combined with proprietary AI algorithms for medical-grade accuracy in HR monitoring.

Yes, our advanced models include a dedicated temperature sensor for baseline deviation tracking, essential for illness detection and women's health projects.

Yes, it analyzes Heart Rate Variability (HRV) and resting HR to provide a continuous stress score for corporate wellness.

Absolutely. HRV and Sleep Recovery Scores provide coaches and athletes with actionable readiness metrics.

The sampling rate is customizable for B2B partners, offering high-frequency data streams necessary for advanced medical analytics.

Yes, Respiratory Rate (RR) is derived from the PPG signal, adding value for respiratory health monitoring.

Yes, the band stores data locally before synchronization, ensuring no data loss during temporary Bluetooth disconnections.

Yes, B2B partners can request access to raw accelerometer data for custom activity algorithms.

The screenless design maximizes battery life (10-14 days) and user compliance, critical for reliable long-term RPM projects.

Typically 10 to 14 days, depending on monitoring frequency, supporting uninterrupted remote patient monitoring.

Our smart bands feature an IP67 or 5ATM waterproof rating, making them safe for showering and daily water exposure.

We use lightweight, hypoallergenic materials (such as PC/ABS or aluminum alloy options) ideal for comfortable 24/7 wear.

Our manufacturing processes follow ISO13485 standards, and products are designed to meet CE/FCC/RoHS requirements for global market entry.

Some advanced ODM models support wireless charging. Standard models use a secure magnetic contact charger.

We use Bluetooth 5.0 or higher (BLE 5.0 chips) to ensure efficient data transfer and low-power consumption.

Yes, the simple, screenless design and long battery life are highly suitable for elderly monitoring programs.

The band supports Over-The-Air (OTA) firmware updates, ensuring partners access the latest AI features.

We offer a wide range of custom color and strap material options for high-volume OEM projects.