Ultra-long battery life. Built-in high-capacity rechargeable lithium polymer battery Comfortable to wear. Ergonomically designed curvature, ear hooks fit your ears and your ears are well balanced When the headset is turned on and successfully connected to a phone or Bluetooth device with calling capabilities, you can make and receive calls. When an incoming call, the headset alert you of an incoming call and the caller's number, contact the feature button once to answer the call, or double tap the feature button if you don't want to answer the call. Voice assistant: When the phone is connected, contact the function button for 1 second and release to activate the language assistant function. Universal for Android and . Comfortable in the hand: the is painted, as delicate and smooth as skin, you love it with every Headset type: Bluetooth headset Wireless frequency: 2.402GHz--2.408GHz Voltage/current: 5V/1A Play/time: about 10-12 hours Button/Touch: Button Low battery reminder: flashing red light Headphone charging time: 1.5 hours Headphone battery capacity: 100mah Bluetooth version: V5.1+ Transmission distance: 10 meters Charging port: TYPE-C Standby time: 400 hours Sensitivity: -42dB Charging time of charging compartment: 1.5 hours Rechargeable battery capacity: 500mah Support agreement: AVRCP V1.6.A2DP V1.3.HFP V1.7 Simultaneous LE and BR / Colour: black Material: ABS Size: 15 x 8.5 x 4cm Package Contents: 1 x earphone 1 x charging cable 1 x charging compartment Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.