1、Charge Interface: High current car charger interface, which can provide up to 5V3.1A charging current for multimedia, such as cell phones, tablets, etc. The USB data port can also be used as a charging port when using a special charging cable. 2、Lossless Sound: This car blue tooth with stereo blue tooth and FM transmitting technology, call with aftersound elimination and noise processing function, automatic matching equipment, high performance stereo sound, no lag, making the sound quality more shocking. 3、Music Playing: Support USB, TF card, blue tooth function, support MP3, WAV format music, you can listen to music while charging, automatic connection memory pairing, so you enjoy a pleasant journey. 4、Colorful Lamp: With 7 color lighting modes, you can get visually striking color display and you can change the colors. It helps you drive easily and more safely in the dark. 5、Usage: Short press the button once to start play or pause, answer or off, etc., press twice to broadcast the last call out number, long press to switch playback mode, rotate to adjust the volume level. Item Type: Blue Tooth Transmitter Material: Plastic and Electronics Interface: USB Maximum Capacity of TF Card: 32GB(Delivered with built in TF card) Power Supply: DC12-24 v Supported File Types: MP3, APE, FLAC, WAV, WMA Operating Current: DC12V 50-100mA Bit Rate: 64-320kbps FM Frequency Range: 87.5-108mhz SNR: 85dB Operating Temperature: 0-60 Degrees Celsius Blue Tooth Version :V5.0 and EDR Transmitting Distance: Less Than 5 Meters 1 x Blue Tooth Transmitter 1 x Specification