Phone Battery -Bluetooth Car Audio Adapter Highlights Generic Brand Bluetooth Car Audio Adapter Description: Receiver Mode: Replace car stereo system or home audio system with Bluetooth-enabled systems. Once paired, play music wirelessly from your Bluetooth smart phone, laptop, tablet, etc. Transmitter mode: can be connected to audio devices (such as MP3, MP4, TV and PC, etc.) without Bluetooth function, changing them to BT-enabled devices, and make them work with BT-enabled headphones and speaker . Support noise cancellation and echo cancellation, giving you beautiful stereo sound and great sound quality. High Compatibility: Compatible for Android and for iOS and PAD smart phones. Can be applied to TVs, home theaters and other devices; Can also be connected to the phone / computer to play music. Specification: Condition: 100% Brand New and High Quality Bluetooth: V4.2 Support: A2DP, AVRCP Support: MP3, WAV, WMA, APE, FLAC Transmission Distance: 10m/33ft (Open Space) Battery: Built-in 300mAh Li-polymer Battery rechargeable Working time: about 8 hours (depending on audio volume) Charging time: about 2 hours Charging: Micro USB 5V Output: 3.5mm stereo interface Input: 3.5mm stereo interface Power supply: 3.7V The color black Material: plastic Size: 60x36x16mm/2.36x1.42x0.63inch Package includes: 1 piece Bluetooth audio transmitter/receiver 1 piece 3.5mm audio cable 1 piece USB charging cable 1 piece user manual