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Product information: Product Name: Youhong J-Stylelife smart fingertip medical Ring ((Model: J2301A) App Support: Android 5.0 and above, IOS 10.0 and above PPG sensor: hardware specifications Somatosensory temperature sensor 3D accelerator: ultra-low consumption Bluetooth chip Material: Standard version is 316 stainless steel, high-end version can choose pure titanium Size: width 8.0mm, thinness 2.85/2.9mm OTA support: supports Bluetooth OTA Battery: rechargeable lithium polymer battery 14.5-21.5mAh (depending on ring shank size) Waterproof grade: 5ATM Data storage time: 15 days
