Features: 1.Bluetooth 5.2 connection, fast connection, low latency. 2.ENC call noise reduction, even in noisy environment still clear voice. 3.Moving-coil composite film, low frequency strong, medium frequency full, high frequency bright. 4.Durable power, strong endurance 5.Domestic waterproofing Note: When purchasing the tws Bluetooth headset, please read the following instructions: Due to long-term transportation, the power of the tws earphone will be exhausted. You will not be able to use the headset when you receive the package. It may be powered off. The first thing to do is to charge the headset box for 30 minutes. Very important. Thank you!