Features: Support call/support recording (outside 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 for play the recorded file; in the recording mode, you need to connect a storage device U disk or TF card; Support USB/TF/Bluetooth-compatible /Radio/AUX automatic switching. Support power-off memory. The product with power amplifier supports balanced output. Support MP3/WMA/WAV/APE/FLAC version of song decoding. Specifications: Material:Plastic Color:Black,Silver;(Optional) RF range: 87.5~108MHz 7V-23V Power Supply, 80W+2x40W 2.1 Channel SNR≥70dB Package Includes: 1x Decoding Board 3x 2P Power Cables 1x1P Power Cable 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.