2301A Smart Health Ring Sleep Heart Rate Fitness Tracker

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