Features: headset easily achieves two-way real-time online translation in 144 languages. BT5.1 Pairing with mobile phone, touch mode, external mode, free to speak mode, offline mode, etc., suitable for a variety of scenarios. It can be used as a smart language translator or as a wireless headset Clear display light to know situation in real time headset is small and designed according to shape of human ear, allowing you to wear it for a long time without any discomfort or burden, bringing you immersive listening experience. Specification: BT version: 5.1 Online language: 144 languages Transmission distance: 10 meters Battery capacity: headset 80mAh/ headset compartment 400mAh Charging voltage/current: 5V/1A Charging port: Type-C Play/talk time: about 7 hours Charging time: about 2 hours APP compatible: Android 5.0 Android phones and above, IOS 9.0, 6S and above Note: Offline mode translation costs extra. If you don't need it, you don't have to pay for it. Package list: 2 * translation headset 1 * charging box 1* Instruction manual 1 *Type-C cable