Feature: 1.QC3.0 port, quick charge, battery voltage detection. 2.Intelligent LED digital display screen, 6 color ambient ring light. 3.2 USB ports, one of which can read U disk. 4.Wireless transmit the music and phone call to your car stereo system. 5.Support MP3, WMA, U disk memory card lossless music(FLAC/WAV/APE). 6.Built-in microphone, with noise suppression, hands-free talking. 7.Compatiable, suitable for all kinds of vehicles. Specification: Product Name: Car bluetooth FM Transmitter. bluetooth Version: V4.2. Effective Range: 5 m. Output: DC 5V. Input: DC12-24V. Frequency: 2.402 GHz-2.480 GHz. FM: 87.5MHz-108.0MHz. Micro SD Card/U Disk Capacity: Up to 32G. Color: Black. Material: ABS(Acrylonitrile Butadiene Styrene). Size: 4.5 x 4 x 8 cm/1.77’’ x 1.57’’ x 3.15’’. Note: 1.The size might be slightly different due to manual measurement. Your kindly understanding would be appreciated. 2.The color of the item may vary slightly due to photography and different PC monitor. Package Included: 1 X Car bluetooth FM Transmitter; 1 X User Manual