Feature: 1. Practical Functions: The radio transmitter car charger with automatic power off memory and voltage detection functions, colorful ambient light bring you a good visual experience 2. Use with Confidence: The car transmitter radio adapter supports USB, memory card, BT function, stereo BT and FM transmitter technology, and can handle aftersound and noise during calls 3. BT 5.0: The FM transmitter car adapter has BT5.0 function, with hands free calling, with automatic power off memory function 4. USB Interface: The USB data interface of the USB charging car charger can also be used as a charging interface when using a dedicated charging cable 5. High Current: The FM transmitter car adapter can provide up to 5V 3.1A charging current for multimedia (mobile phones, tablets, etc.) with high current car charger interface Specification: Item Type: FM Transmitter Car Adapter Material: Plastic, Electronic Interface: USB2.0 Support Memory Card Maximum Capacity: 32GB Power Supply: DC12 to 24V Supported File Types: MP3, APE, FLAC, WAV, WMA Working Current: DC12V 50 to 100ma Bit Rate: 64 to 320kbps FM Frequency Range: 87.5 to 108MHz Signal to Noise Ratio: 85dB Operating Temperature: 0 to 60 Degrees Celsius BT Version: V5.0 and EDR Transmitting Distance: Less Than 5meters/5.5yd. Package List: 1 x FM Transmitter Car Adapter1 x User Manual