Smart Bracelet, Beeiee Bluetooth 4.0 Smart Sports Bracelet Watch with HD OLED Screen and 5 Modes (Time mode,Step tracker,Calories mode,Distance mode and Sleep monitoring mode) 5 modes HD displayed on the OLED screen:Time mode,Step tracker,Calories mode,Distance mode and Sleep monitoring mode. Smart bracelet is applied by professional Bluetooth RF signal and own-developed algorithm,the accuracy can reach 95% and above. Once the fitness monitor connected to smartphone,it wil record and analyze your activities and sleep status automatically. Vibrating alert,when having a call or smartphone beyond 16 FT,never miss important calls also anti lost phone. Keep the bracelet screen horizontal and turn over wrist,then it shows time and take picture when the APP program stars.