Specifications: Instant solution to turn car stereo system into Bluetooth wireless environment for hand free calls on the road and access to the music on mobile devices. High-performance cigarette lighter car charger with 5V/2.1A USB output. Works with Bluetooth enabled devices and all cars with a 3.5mm AUX input. Enjoy your favorite music from your smart phones. Audio transmission, lossless transmission, standard 3.5mm audio output. Support Bluetooth hands-free function. Support common function control, such as play/pause/previous song/next song. Key with backlight design, easy to operate. Initial Setup: Insert the power plug into your car's 12V power outlet Insert the audio cable into your car's AUX port. If the cable is too short, use the extension cable included in the package. Turn on your car stereo and set the input source to AUX. Type: Car Bluetooth Receiver Material: ABS Bluetooth Version: 3.0 (Support A2DP, AVRCP) Compatibility: Bluetooth Version Input Voltage: 12V - 24V Output: 5V, 2.1A Working Temperature: 0 - 60℃ SNR: >90dB THD: