Features: Support call / recording (outside recording). Recording needs to operate 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 for play the recording file; in the recording mode, you need to connect the storage device U disk or TF card;) Support USB/TF/Bluetooth-compatible/Radio/AUX automatic switching Support power failure memory function: memorize the song and volume before the power failure Products with power amplifier support balanced output, stereo power 2x50W. Support MP3/WMA/WAV/APE/FLAC version song decoding. Specifications: Material:Plastic RF range: 87.5~108MHz Bluetooth-compatible Version:5.0 7V-22V Power Supply,2x50W Signal-to-noise ratio≥70dB Package Includes: 1x Decoding Board 3x 2P Power Cables 1x Remote Control note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.