Sleep Analysis: It can analyze your sleep quality to help you get better sleep Health Monitoring & Fitness Tracking: It can monitor your 24-hour heart rate, blood oxygen saturation, making sure you know your health at all times. And it can accurately record your steps, distance and calories consumed Camera Remote Control: Use as a remote shutter, allowing you to take selfies or group photos without help. You can easily record the perfect shot even when you are alone Waterproof Design: Whether daily washing hands or taking a shower, it can provide reliable waterproof protection Wide Compatibility: It supports for Android 5.1 and above, for iOS 8.0 or above Specifications: Size: #7 inner diameter: 17.3mm #8 inner diameter:18.1mm #9 inner diameter: 18.9mm #10 inner diameter: 19.8mm #11 inner diameter: 20.6mm #12 inner diameter: 21.4mm #13 inner diameter: 22.2mm Chip: JL AC6323 APP: Smart Health Compatible system: Android 5.1 (inclusive) and above, iOS 8.0 (inclusive) and above RAM: 4MB Screen: none Resolution: none Encoder: none Touch control: not support Bluetooth: 5.0 Bluetooth call: not support WiFi: not support NFC: not support Acceleration sensor: SC7A20H Gyroscope: not support Heart rate sensor: Goodix GH3018 GPS: not support Battery type: polymer lithium ion battery Battery capacity: 20mAh Charging method: magnetic charging Function: health monitoring (steps, kilometers, calories, exercise data recording, heart rate measurement, blood oxygen measurement, sleep health monitoring), smart photo taking, adding friends, multiple sports modes (running, cycling, skipping, walking, mountaineering, yoga, golf, dancing), etc Supported languages: English, Simplified Chinese, Traditional Chinese, Russian, Ukrainian, German, French, Italian, Spanish, Portuguese, Polish, Greek, Romanian, Hungarian, Czech, Slovak, Irish, Croatian, Swedish, Danish, Finnish, Arabic, Persian, Norwegian, Japanese, Korean, Thai, Vietnamese Waterproof rating: IP68 Charging time: about 1-2 hours Usage time: 3-5 days Standby time: 7-10 days Appearance material: epoxy resin + stainless steel Package included: 1 x Smart Ring 1 x Charging Cable 1 x English User Manual Other things not included