Features: Frequency ranging: 87.5～108.0Mhz; Support playback of songs from disk and small memory card. Through the Bluetooth-compatible A2DP technology, transmit mobile phone auditory and music to the car Bluetooth-compatible handsfree call function USB can be charging to a variety of mobilephones, up to 3.10A charging current Wide voltages power supply 12V-24V, suitable for various voltages car use Specifications: Type: usb Size:about 7.30x4.5x3.2cm/2.87x1.77x1.26in Component:ABS+Electronics Frequency ranging: 87.5～108.0Mhz Working voltages:12～24V Consumption rate:0.5W Operating temperature:10~70 degrees Frequency Response:20Hz～15Khz Auditory Format:MP3 Noise:68dB Bluetooth-compatible version: v5.0+EDR Bluetooth-compatible sound processing-phonetic sound:A2DP Bluetooth-compatible transmission distance:about 10~15m/32.8-48.2ft Package Includes: 1PC X8 Wireless Charging Adapter note: Due to the problem of lighting effects, there is certain tolerances in product, please understand. Please allow 0-1cm error due to the measurement.