smart ring size 8 color silver

open box unused inside unisex smart heart ring, mobile app real time,can view monitoring data on app. SIZE 8 finger material is metal and electronic components litium battery built in18mAH , 128 k internal memory magnetic charger, charging time 1 hour, standby time 15 days waterproof rating IP68 activity tracker., multi sport, supports basic functions, shake to take photos intelligent pedometer, sports modes made in china open box contains 1 unused smart ring 1 charging cable only NO adapter 1 user maual