Features: 1. Start up and check the battery voltage.It comes with a car charger with an output of 5V-3A, which can charge the handheld terminal equipment. 2. Support Bluetooth hands-free calls, built-in microphone, convenient and safe answering calls; caller ID 3. Noise processing during calls, wind noise suppression, full-duplex call technology; AVX port output and input. Song name display 4. Support the A2DP function of mobile phones, and play high-quality mobile music directly after connecting to Bluetooth; Support TF card expansion to play MP3/WMA format music; 5. Automatically connect back after turning on the power, and automatically enter the pairing state; parameter: Model: T70 Bluetooth version: V5.0 QC port output: 18W PD port output: 20W Input voltage: DC 12-24V QC port output current: 5V/3A 9V/2A 12V/1.5A PD port output current: 5V/3A 9V/2A 12V/1.5A Music format: MP3, WMA, WAV, FLAC Material: plastic colour: black Package Contents: 1 x 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.