Let You Enjoy Real RGB Lighting in the Car Stronger Connection Adopted with Bluetooth 5.0 chip, our Bluetooth FM transmitter comes with stronger signal and faster speed in data transmission, so there won\'t be any buzzing noise or random disconnecting problems in calling or music playing. Safe and Reliable to Use Smart voltage detection with 6 security protections such as overcurrent/overvoltage/overheat/over-charge/overload/short circuit protection. Our car audio Bluetooth adapter can keep both you and your car safe. Energy-saving & Wide Compatibility With a power button and a light button, you can freely turn off the product or its light if you don’t want to use them for power saving. Widely compatible with all Bluetooth-enabled devices and 12-24V vehicles. Easier to Use 1.Tune your car radio station to a blank/an unused FM channel (A channel without any broadcast). 2.Tune the transmitter’s frequency to be the same as that of the car. 3.Connect your phone to transmitter via Bluetooth, or play music directly via U disk or TF card. Smart Car Voltage Detection Below 12V: Have to replace car battery immediately. 12.0V-12.8V: Normal voltage for a car that is not started. 13.0V-14.8V: Normal voltage for a car that is started. Specifications Working Distance: 5 m/ 16.4 ft Support Audio Format: MP3/WMA/WAV/FLAC Support Bluetooth Protocol: A2DP/AVRCP/HFP/HSP QC3.0 Quick Charge Port: Support QC3.0 Quick Charge (5V/3A, 9V/2A, 12V/1.5A) 3 Music Playing Sources: U Disk (Max. 32 G)/TF Card (Max. 32 G)/Bluetooth Package Includes 1 x Bluetooth FM Transmitter for Car