Specifications:Compatible Brand: UniversalColor: BlackItem Length: 26cm/10.24" (Approx.)Audio Cable Length: 30cm/11.8" (Approx.)Rated Working Voltage: 12V-24VLimit Voltage: 9-26VPower Consumption: 1WUSB Charging Output: 5V/500mAWork Temperature: -20-50DegreeSupport Format: MP3SNR: >60dBFrequency Response: 20Hz-15KhzFM Emission Frequency: 87.5-108MHzBluetooth Version: Bluetooth 2.1 + EDRBluetooth Transmission Distanc: 10-15mFeatures: Bluetooth Wireless， LCD Screen， FM TransmitterBluetooth Sound Processing: With the AD2P Function (Advance Audio Distortion Profile)Compatible Product: Bluetooth-enabled mobile devices， Smartphone， Tablet PC， etc.How to use it:Inserting the plug of the cigarette lighter into the hole of the car cigarette lighter.Turn on the car radio， and utilize the FM of the Radio to search a vacant channel， or slightly adjust the FM channel， you can also adjust the frequency in accordance with the frequency of car radio.Inserting the external USB flash disk， or SD/MMC card into this item， it will play the music in the USB flash disk， or SD/MMC card.Package included:1 x Car Kit Bluetooth FM Transmitter Modulator MP3 Player (USB flash disk， SD card， MMC are not included)1 x Remote Control Unit1 x Audio cable1 x User Manual