Features: 1.Unique dual?screen display design can show more information, such as battery voltage, volume and FM channel, making you more focused while driving. 2.3 USB charging ports: 18W USB?C, QC3.0 (DC5V/3A, 9V/2A, 12V/1.5A) and USB?A charging ports. Power Delivery technology can provide ultra?fast charging for all USB?C devices and meet all mobile phone charging. 3.Equipped with a stable connection environment with Bluetooth 5.0 chip, noise cancellation technology can reduce road noise and bring you a clear call sound. 4.Allows you to get information through voice guidance, such as pairing instructions, status updates, and you can also focus on the road by using for Siri or for Google Assistant to make calls, send text messages or get driving directions. 5.With 7?color LED backlight, which can be switched from red/green/blue/yellow green/purple/cyan/silver white to provide you with a different driving experience. Specification: Item Type: FM Transmitter Material: ABS Model: BC67 Rated Working Voltage: 12V-24V Limit Working Voltage: 10-26V USB1: U disk playback 1G-64G USB2: PD3.0 (maximum 18W) USB3: QC3.0 (maximum 18W) Working Temperature: 0-50 Support Playback Format: MP3 / WMA / WAV / FLAC Signal To Noise Ratio: >60dB Battery Voltage Error: 0.5V Charging Current Error: 0.1A Bluetooth Version: Version 5.0 Bluetooth Sound Processing: With for DSP technology and A2DP (Advance Audio Distribution Profiles) function Bluetooth Transmission Distance: Approx. 10M/32.8ft Bluetooth Microphone Effective Distance: 0.5-2M/1.6-6.6ft FM Transmitting Frequency: 87.5-108Mhz Transmit FM Mode: Stereo digital for PLL frequency lock How to Use: 1. Check whether the voltage is 12-24V 2. Check the cigarette lighter socket 3. It can be used by inserting the cigarette lighter PackageList: 1 x Host 1 x Manual