Use QCY to easily modify the configuration and settings of your multi-smart devices（Bluetooth headset and smartwatch）. 1.Bluetooth headset Features： 1.1 View battery 1.2 Toggle sound EQ 1.3 Set function keys 1.4 Firmware upgrade 2.Key features of smartwatch（QCY Watch GTC） Fun: 2.1 Health data display Record steps, consumption, heart rate, sleep and other data . 2.2 Multiple sports records record exercise data such as duration, heart rate, consumption, distance, pace, exercise target 2.3 Dev