Feature:1. The FM Transmitter has a battery voltage detection function.2. Support bluetooth hands-free calls,  built-in microphone,  safe answer the phone.3. support for mobile A2DP function,  even after playing bluetooth high quality mobile phone music.4. Power automatically back to the boot,  automatically enter the pairing state.5. Support U disk expansion play MP3/WMA/WAV/FLAC format music.6. Comes with USB (Universal Serial Bus) charger,  output 2.1A+1A,  can charge for mobile terminal equipment.7. HD display,  you can clearly show the FM frequency,  song name,  player status,  connection status.8. Two charging ports,  the output 12-24V,  supplying power for your electronic equipments. Specification: Power Supply: DC12-24 V Interface: USB2.0 Screen: Orange LED Screen Power Supply: Cigarette Lighter Power USB Output: 3.1A (Max) Memory Card Type: TF Card (Not included) Support TF Card / U Disk Capacity:32GBSupported File Types: MP3 / WMA / WAV / FLACWorking Current: 50-100m A DC12 V Bit Rate: 64-320kbps FM Frequency Range: 87.5-108 M Hz Signal to noise ratio: 85db (FM: 65db) Harmonic Distortion: 0.05% FM: 0.1%) Operating Temperature: 0 ℃ -60 ℃ Suitable Models: DC12V -24V Car GMLaunch Distance: 5 meters Weight: 60g
 Size: 65 * 26 * 87mm Package Included:1 X Wireless bluetooth Car FM Transmitter 1 X User Manual