PREV/VOL- long press to decrease the volume; short press in the USB/TF/Bluetooth/radio mode is the previous song/previous stationPLAY/PAU in the USB/TF/Bluetooth mode, short press for play/pause; long press for mode switching,/VOL+ long press to increase the volume; short press in the USB/TF/Bluetooth/radio mode is the song/ stationMODE is the mode switch, a of 5 modes (Bluetooth-TF-USB-FM-AUX).5V-12V supplySupport folder selection and playbackSupport call/support recording (external recording). Recording needs to be operated in TF mode or USB mode.(Long press the MODE button to start recording, long press the MODE button again to cancel the recording and play the recording file; in the recording mode, a storage device U disk or TF card needs to be connected;)Support USB/TF/Bluetooth/Radio/AUX automatic switchingSupport -off memory function: memorize songs and volume before -offProduct with amplifier supports balanced output, stereo 2*25W.Support MP3/WMA/WAV/APE/FLAC version of song decodingS ratio greater than equal 70dBAudio frequency range: 87.5-108MHzsize:93 x 36mmMaterial:plasticcolour:blackPackage Contents:1 x Decoder board3 x 2P cord1 x 1P radio antenna1 x remote controlOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.