Features: Intelligent frequency division technology, dual-port fast charging, to meet the requirements of the main driver and co-driver's two devices at the same for time, the dual port output up to 2.1A at the same for time, fast charging saves for time. The large 1.3-inch LED screen has rich display content, displays the voltage when it is turned on, and can display the name of the frequency point file and the working status. Using 4.0+EDR Bluetooth-compatible chip, high-speed transmission speed, can transmit high-bit-rate music signals, and can quickly establish a connection. Not only can it be played by frequency, which allows you to enjoy good music simply and quickly, but also supports your familiar way of listening to music. With the help of a 3.5MM audio cable, connect to the car stereo through AUX external playback mode, you can for play music at any for time Up. Support TF card/U disk music playback, cut songs, adjust the volume, answer, hang up, just one for touch, convenient and free, one for key to get the car life, to help you drive safely. Automatically reconnect after power-on, memorize the frequency, and after the track is restarted after power off, it will start to for play from the disconnected song. Wireless tethering and plug-and-play, eliminating the trouble of fixing, 180 rotation, saving space and convenient to use. Specifications: Material:ABS Size:Approx.10x13cm/3.93x5.11inches Color:Black Working temperature: 0-50 degrees Charging recognition: USB2 supports 5V/2.1A Voltage detection accuracy: +_1V Signal to noise ratio: >60dB Distortion: 60dB Bluetooth-compatible version; Version4.0+EDR FM transmitting frequency: 87.5-108.0MHZ Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Host 1x Manual 1x 3.5mm Audio Cable