Support calls/support recording (external recording). Recording needs to be operated in TF mode or USB mode. (Long the MODE button to start recording, long the MODE button again to cancel recording and play the recording file; in recording mode, you need to connect a storage device U disk or TF card;) Support USB/TF/Bluetooth/radio/AUX automatic switching Support power-off memory function: remember the songs and volume before power-off The product comes with a power amplifier that supports balanced output and a stereo power of 50W. 5V-12V power supply Support folder selection playback Support MP3/WMA/WAV/APE/FLAC version of song decoding Signal-to-noise ratio ≥70dB Radio frequency range: 87.5~108MHz Due to different batches, there may be differences in product appearance and printed text, which not affect use Button function "PREV/VOL-" long to reduce the volume; in USB/TF/Bluetooth/radio mode, short to the previous song/previous station "PLAY/PAU" short to play/pause in USB/TF/Bluetooth mode; long to switch modes. "NEXT/VOL+" long to increase the volume; in USB/TF/Bluetooth/radio mode, short to song/next radio station "MODE" is mode switching, a total of 5 modes (Bluetooth-TF-USB-FM-AUX Colour:silver Material:plastic Package Contents: 2 x Host 6 x 2P power cord 2 x 1P radio antenna 2 x Remote control Only the above package content, other products are not included. Note: Light reflection 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.