HIGH BLUETOOTH VERSION 5.0: The FM transmitters use the Bluetooth 5.0 high version which not only provides a stable connection and echo cancellation reduces background noise for better hands-free calls. Upgrade breaks the ability to connect 2 phones. 7 COLOR LIGHTS SWITCH: Short press "M" to change the light color at any time. Switching red/orange/yellow/green/cyan/blue/purple/breathing light sequence, you can visually achieve breathtaking color display. The best way to increase ambient light in the car. DUAL USB CHARGING CONNECTOR: Bluetooth transmitter can automatically detect charger type, USB1 5V/2.4A, USB2 QC3.0 charging fast, get the maximum 5V/3A charging current and save charging time while protecting the phone while charging. 3 MUSIC PLAYING MODES: The Bluetooth car kit can play high-speed music quality (MP3/WMA/WAV formats), support Bluetooth input, TF card input, AUX input mode; FM87.5-108MHZ full frequency point broadcast. SUPPORT SIRI/GOOGLE ASSISTANCEFM-transmitter Support triggers Siri/Google mobile phone voice assistant to ensure safe driving. One-click voice assistant to make calls, send texts or get directions. Enjoy full voice control while driving. If you have any questions, please contact us and we can provide after service. -Satisfactory sale.