1:Charge two devices simultaneously, USB 5V/2.4A + PD: 5V/3A, 9V/2A, 12V/1.5A Make charging without waiting 2:Large screen display, lossless sound quality, TF card playback can display lyrics 3:Retractable spring cable, AUX audio output, support incoming call number broadcast, one key to answer and hang up the phone 4:Real-time monitoring of battery voltage for unlimited models to protect your safety 5:Short EQ key to adjust the subwoofer mode 1.Bluetooth Version: 5.0 Transmission 10m 2.Applicable Models:12v-24v Car 3.Screen:large Lcd Screen for Better Clarity at Night. 4.Fm Transmitter: 87.5-108.0 Mhz Frequency Range (short Ch Button, Frequency Adjustment) Wireless Hands-free Calling with Built-in Microphone for Easy and Safe Call Answering (short to Answer and Hang Up, Long to Reject) 5.Streams Music from Smartphone to Car Audio System Via Fm Transmission. 6.Supports Tf Card Playback, Plug and Play Aux Audio Connection, Connects Your Phone Directly to the Player Without Going Through Bluetooth, Avoiding Signal Interference Note: Due to different production batches, there may be slight differences in products. Colour:P o Color Material:plastic Package Contents: 1x Car handfree FM transmitter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.