This is a car adapter and it is compatible with enabled devices, like , , , Tablet, or MP3, MP4 Players. Adopted advanced and noise cancellation technology - technology creates full duplex sound and suppresses noise. With 2 usb ports to charge most USB devices and built-in microphone supports hands-free talking. Features: - Color: Black - Material: PC - Size: 15.3x4x8cm - Bluethooth Version: 3.0 - In put Voltage: 12V- 24V - Out put Voltage: 5V - Out put Power: 5V / 2.1A, 5V / 1A - Profile: A2DP, , AVRCP - Supported Audio Format: MP3/WMA/FLAC - FM Range: 87.5-108.0MHz - Response: 20Hz-20KHz - Effective Distance: Up to 5m / 16ft - Utilized most advanced and noise cancellation technology, it owns good sound and performs well in handfree mode. - Comes with 2 charging ports to charge most USB devices; built-in microphone supports hands-free talking. - Support A2DP function to play great sound music after connecting by . - Automatically of battery voltage after turn-on. Support expansion to play music of MP3 / WMA format - AUX Port supports in-put and out-put. Support showing music name on display screen. Package list: 3 3 x user manual 3 x cable