Feature: 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 AdapterMaterial: 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/0.14inWireless Transmission Mode: Used in computer, TV, projectorWireless Reception Mode: Used for car sound system, speaker, earphone Package List: 1 x Bluetooth Adapter1 x 3.5mm Audio Head1 x Charging Cable1 x Manual