R17 Smart Ring | Heart Rate, Blood Pressure, SpO2 & Sleep | 5ATM 50M Waterproof

The Ultimate Embodiment of High-End Technology and Exquisite Craftsmanship.

The R17 Smart Ring by Lefun Health is a precision health wearable with a built-in color LED display, medical-grade construction, and 5ATM waterproofing rated to 50 meters. Just a touch of the side button gives you instant access to time, steps, heart rate, blood pressure, SpO2, and sleep data — all on your finger. Backed by the Lefun Health app (LefunOS), your health data is always within reach.

Just a Touch of Your Finger — Instant Response

Touch the side button to display time, steps, heart rate, and other data to remind you at all times. The built-in color LED screen shows vivid real-time metrics directly on the ring.

Side button: instant display of time, steps, heart rate, SpO2, blood pressure, and sleep
Color LED screen on the ring face — easy to read at a glance
Humanized arc design — medical grade inner ring, skin-friendly and anti-allergic
Metal shell — lightweight, wear-resistant, and corrosion-resistant

Comprehensive Health Monitoring

Continuous 24/7 tracking of your most critical health metrics, synced to the Lefun Health app for professional reports and trend analysis.

Heart Rate (HR): Continuous monitoring (e.g. 088 bpm real-time display)
Blood Pressure (BP): Regular blood pressure monitoring
Blood Oxygen (SpO2): Real-time SpO2 tracking (e.g. 99 SpO2)
Sleep Duration: Full sleep tracking with deep/light/awake analysis (e.g. 7:30 sleep display)
Step Count & Calories: Precise daily activity tracking
Friends & Family Map: Share health data with loved ones via the app

5ATM Waterproof — Submersible to 50 Meters

Rated 5ATM, the R17 is built for swimming, showering, heavy exercise, and daily water exposure. Submersible to 50 meters.

5ATM waterproof — submersible to 50 meters
Suitable for swimming, showering, rain, and intense exercise
Wear it anywhere, anytime

Long Battery Life — No More Worries

Stronger performance, lower power consumption. The R17 offers up to 5–7 days in long battery mode, with 3–5 days in normal mode. The wireless charging case provides up to 13 additional charges.

Long Battery Mode: 5–7 days per charge
Normal Mode: 3–5 days per charge
Charging case: up to 13 full recharges when fully charged
Wireless charging case included
Type-C charging cable included
Data storage: 15 days of offline data retention
OTA support: Bluetooth OTA firmware updates

Lefun Health App — Happy Sports, Healthy Life

Connect to the Lefun Health app (powered by LefunOS) for a complete health dashboard, family care features, GPS mapping, and AI-powered health insights.

App: Lefun Health — Android 6.0+ / iOS 13.0+
Real-time heart rate, SpO2, blood pressure, and sleep dashboards
Friends and family map — share location and health data
Record: daily steps, calories, sleep duration
Lefun GPS integration
AI health analysis and recommendations
Leaderboard, health column, and knowledge articles

Key Specifications

Specification	Details
Material	316 Stainless Steel (standard version)
Hardware	PPG sensor, 3D accelerometer, ultra-low power Bluetooth chip
Ring Width	8.2mm
Ring Thickness	2.85mm / 2.8mm
Battery	18mAh rechargeable Li-Polymer (varies by ring size)
Battery Life	5–7 days (long battery mode) / 3–5 days (normal mode)
Charging Case	Wireless, up to 13 recharges; Type-C cable included
Data Storage	15 days offline
OTA	Bluetooth OTA supported
Waterproof	5ATM (submersible to 50m)
App	Lefun Health — Android 6.0+ / iOS 13.0+
Colors	3 colors available
Package	Ring, wireless charging case, Type-C cable, gift box, instruction manual