When purchasing and using this product, please pay attention to the polarity of the power supply to avoid burning out.Bluetooth version is 5.0music format: MP3 / wma / WAV / FLAC / ape lossless music formatRadio frequency: 87.5-108.5 MHzUSB charging and discharging power: 10W (5V-2A)Function Description: support mp3 / USB / TF / line input / FM / Bluetooth / remote control / DC: 6v-12vFeatures:1. Bluetooth hands free call and Bluetooth support external touch key2. Support folder selection (remote control operation) - easy to select and play cards / USB flash drives of different music categories, and place different cards / USB flash drives in music categories3. Support USB / TF / Bluetooth / FM / aux automatic switching.4.Support mp3 / wma / WAV format music. MP3 songs 32-320kbps, wav / wma: 1411kbps or lower5. Support USB / card switching, song, next song, volume control, EQ, play / pause, stop, mute, power off, direct selection of songs.6.Support Bluetooth one, next song, volume control, play / pause, mute.7.Support power supply and memory function: before playing the song, the memory is turned off, and the volume can be memorized to the current point. Breakpoint memory (take out the U disk or TF Card in play mode, and play the breakpoint memory about three seconds after the first power failure)Recording function description :Press and hold the mode button to start recording. Press and hold the mode button again to cancel the recording function. Press and hold the play / pause button to play the recorded file. The recording device must be connected to the recording device, such as USB flash drive or TF card;Package Contents:1 decoder1 x remote control (without battery)