Long Battery Life It can be fast charged within 15min and can last for about 5 hours of continuous calls and up to 16 hours in standby mode. Widely Compatible The wireless headset can be paired quickly and answer calls conveniently, meeting your all calling needs. It supports most devices, such as laptops, tablets, smartphones, computers, PC. Clear Quality Sound Uses a sensitive microphone to recognize vocals, is clear and comfortable, offers clear audio and a natural sound, and allows you to enjoy high-quality music and clear phone calls. How to connect: Before the first use,please use the Type-c charging wire in the package to combine 5V-chargers below 2A charge the headset for more than 30 minutes, and turn on the machine after fully charged. 1. Press and hold the multi-function touch key for 5s to start the machine(the second time after the first connection is successful,It will automatically connect when the machine is started.) 2.Open the mobile phone Bluetooth or other devices: Settings-Bluetooth-Search Bluetooth name Click "YJ-77" to connect. NOTE: Chinese/English mode switching: Double-click the touch button when not connected.