Features 1、Lossless Sound Quality: High resolution restoration of lossless sound quality bringing CD level music experience, just plug and play, you can listen to the music in your phone. 2、Wireless Transmission Mode: Convert wired audio into wireless signal, transmission to wireless device output, can be used in computer, TV, projector. 3、Wireless Reception Mode: Can be used for car sound system, speaker, earphone, connect the audio access port, audio without wireless function can also be played wirelessly. 4、Hands Free Free Call: Connect the wireless connector to the car aux interface, wireless connection car audio, you'll be able to talk wirelessly, making driving safer. 5、Power Supply: Built in rechargeable lithium battery, charge once last for 4 hours, when the battery is low it can be used while charging, convenient and worry free. Specification Item Type: Bluetooth Adapter Material: ABS Wireless Version: 5.0 Battery Capacity: 140mAh Lithium battery (included) Tansmission Distance: Approx. 10m/393in (without any obstacles) Charging Time: 1h Use Time: 4h Output Interface: Approx. 3.5 mm/0.14in Wireless Transmission Mode: Used in computer, TV, projector Wireless Reception Mode: Used for car sound system, speaker, earphone Package List 1 x Bluetooth Adapter 1 x 3.5mm Audio Head 1 x Charging Cable 1 x Manual