Features: brand new and high quality Durable: It has 4 hours battery life, lossless sound quality, hands-free calling, plug and for play, AUX interface. Connect to the TV: Connect to the TV's 3.5mm audio interface, and transmit the sound to the headset via wireless, so you are not afraid to disturb your family when watching movies at night. Practical: This product can be connected to a car stereo, it can not only make calls, but also listen to dynamic music, so your journey is no longer alone. Lossless sound quality CD level enjoyment: high-resolution restoration of lossless sound quality, bring CD level music experience only one, you can listen to the music in your phone. Fully charged once and used for 4 hours: the built-in rechargeable lithium battery can be charged once, and can be used for 4 hours when the battery is low, which is convenient and worry free. Package Includes: 1 x Bluetooth-compatible Audio Adapter Specifications: Material: ABS Color: Black Interface type: 3.5mm/USB interface Bluetooth-compatible version: 5.3V Applicability: computer, TV, projector (transmitting mode)/speaker, earphone, car (receiving mode) note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you