Item Type: FM Transmitter Material: ABS Rated Working Voltage: 12V-24V USB1 Output: 5V/1A USB2 Output: 5V/3.1A Support Music Format: MP3/WMA/WAV/FLAC/APE Support U Disk Capacity: Maximum 64G Support Memory Card Capacity: Maximum 64G (not included) Battery Voltage Accuracy: Error ±1V Signal to Noise Ratio: >60dB Distortion: <0.1% Frequency Response: 20Hz-20Khz Left and Right Channel Separation:> 60dB Bluetooth Version: Version 5.0 Bluetooth Sound Processing: with A2DP (Advance Audio Distribution Profiles) function Bluetooth Transmission Distance: Less than 10M Bluetooth Microphone Effective Distance: 0.5-2M Installation Instructions: Plug and Play 1、Car FM transmitter, support 87.5‑108.0MHZ FM full frequency point transmission. Support mobile phone navigation and voice prompts. 2、Bluetooth 0, with the functions of answering, hanging up, rejecting and redialing calls, free your hands. 3、Bluetooth stereo music playback, support MP3/WMA/WAV/FLAC/APE music format and support U disk memory card (not included) playback. 4、2 USB output, support 5V/1A and 5V/1A mobile phone charging, with charging recognition, convenient for using. 5、Digital tube display, clear and intuitive, easy to operate. With colorful atmospheres light, more stylish. 6、It can detect the voltage of car battery, allowing you to know the battery status in time. With automatic power-off memory function, reliable to use.