High-Bluetooth Version 5.0: The FM transmitter uses High-Bluetooth Version 5.0, which not only provides a stable connection, but also the echo cancellation reduces background noise for better hands-free calling. The upgrade broke the ability to connect 2 phones. 7-color light switch: short press "M" to change the light color at any time. Switch the sequence of red or orange or yellow or green or cyan or blue or purple or breathing lights to get visually stunning color display. The best way to increase ambient light in your car. Dual USB charging ports: The Bluetooth transmitter can automatically detect the charger type, USB1 5V or 2.4A, USB2 QC3.0 fast charge, get the maximum charging current 5V or 3A, save charging time while protecting the charging mobile phone. Support Siri or Google Assistant: FM transmitter supports mobile phone voice assistant Siri or Google to ensure driving safety. One-touch voice assistant function to make calls, send text messages or receive directions. Enjoy full voice control while driving. If you have any questions, please , we can provide satisfactory after-sales. - Serve. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.