"Hands-free calling and high-quality sound: The Bluetooth headset adopts Bluetooth 5.1 chip technology, which provides clearer sound and stable connection, allowing you to hear clear calls, just like you communicate with others face-to-face. Don't worry about being interrupted while listening to music and talking. LED Charging Case & 80 Hours Playtime: Built-in 500mAh battery LED charging case, the bluetooth headset with microphone can be fully charged within 1.5 hours. With the charging box, the headset can be used continuously for about 80 hours, and it can also provide 5-6 charges for the wireless headset. In-Ear Comfortable Wearing Design: The in-ear design can fit the left/right ear more comfortably. The earhook can rotate 180 vertically and 360 horizontally, and the flexible earhook is comfortable to wear. It's light and comfortable enough to wear for hours. Ease of operation: The buttons on the wireless earbuds are physical, so there are very few glitches. All operations such as song forward/rewind, music play/stop, answer/end/reject/, redial, mute function and SIRI are all easily accessible through the buttons on the ear, even with one hand. The remaining battery power is displayed in the upper right corner of the smartphone home screen. You can keep track of your battery level at any time. Two ways to charge and connect two devices: You can use the TYPE-C charging cable or the charging box to charge the Bluetooth mobile phone headset. It can also connect 2 devices simultaneously so you can keep your life and work separate. This is ideal for office environments and driving."