Specifications Hign-concerned Chemical:None Waterproof Grade:None Model Number:R10M Display screen:No NFC Support:No Activity Tracked:Steps Tracker,Calorie Tracker,Distance Tracker,Activity Tracker Metrics measured:Heart Rate Monitor,Blood Pressure Monitor Item Weight:0.135kg Case Material:STEEL Certification:ce Brand Name:KGG Battery Capacity(mAh):15mAh Note: 1.Forbestperformanceandaccuracy,werecommendwearingtheRingonyourindexfinger.Ifyoupreferotherfingers,themiddleandringfingersarealsoOK.Avoidfingerswherethebaseisnarrowerthantheknuckle. 2.Thesizeofringsmaynotbecompletelyinlinewithuniversalstandards.Pleasemeasureyourfingercircumferencebeforepurchasingandmakesureitfitscomfortably,thenchoosetheappropriatesize. 3.Howtostart:ChargetheRingwiththeincludedchargingcable.Theheartratelightwilllightuptoindicatesuccessfulstartup.ThenyoucanusetheAPP toconnecttheRing. 4.Duetodifferentdisplayandlightingeffects,theactualcoloroftheitemmaybeslightlydifferentfromthecolorshownonthepicture.Pleaseallow1-2cmmeasuringdeviationduetomanualmeasurement,thankyou! 5. It is Life waterproof only, it mean you can wear it when you wash your hand or get wet in the rain, but can't wear when swimming or hot shower/bath or sauna. It can not be soaked in water. parameter: Chipset: AC6323 APP:Smart Health Compatible System: Android 5.1 or above, iOS 8.0 or above RAM Memory (built-in in the main control): 4Mb BT: 5.0 Bluetooth chip Acceleration Sensor: SC7A20H Heart Rate: Peak GH3018 Battery Type: Polymer Lithium ion Capacity: 15mAh Charging Method: Magnetic charging Waterproof Level: IP68 Charging time: approximately 1-2 hours Appearance material: epoxy resin+stainless steel Function Steps, kilometers, calories, exercise data recording Heart rate measurement, blood pressure monitoring, sleep health monitoring, intelligent photography, adding friends Multiple sports modes, including running, cycling, skipping rope, brisk walking, hiking, yoga, golf, and dance APP supports 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 Detailed pictures: