1、Wireless Connection: Connect the phone and this adapter via bluetooth, support one key answering, redialing, hanging up or rejecting calls. 2、Noise Reduction: Built in microphone and noise suppression technology for clearer hands free calls. Make your driving more fun and safe. 3、7 Color Backlit: 7 color LED light modes for stunning visual effects, you can keep 1 color or change colors in sequence. 4、Dual USB Fast Charger: 5V 3.1A and 5V 1.0A USB charging output, the charging speed is 3 times that of ordinary ports. 5、Universal: Support U disk and memory card, call voice broadcast, music EQ mode. Suitable for 12V/24V car cigarette lighter. Item Type: Bluetooth FM Transmitter Material: ABS Working Voltage: 12-24V Transmission Distance: Approx. 5m/16.4ft Supported Formats: MP3, WAV FM Frequency: 87.5-108.0MHz Working Temperature: 0-55℃ USB Charging Output: 5V 3.1A, 5V 1.0A Bluetooth Version: 5.0+EDR Function: Support U disk, memory card, voice broadcast of incoming calls, music EQ mode. 1 x Bluetooth FM Transmitter 1 x Manual