Compatible with iOS, Android Monitor activities Throughout the day: steps, calories burned, mileage and heart rate Smart reminder: Call reminder, sms button, sedentary reminder. More features: Phone search, remote camera shooting, clock stop. Continuous heart rate monitor: continuous automatic monitoring of the heart rate on the pulse every second. 0.96 "color TFT To-uch screen: hd screen, easy to read all fitness data. Bluetooth 4.0, Compatible with android 5.0 and higher systems, ios 9.0 and higher systems.