Feature:1. With a display screen, the operation can be clearly seen.2. Support FM radio function, U disk play and memory card play.3. Equipped with power amplifier, it can be connected with 3Wx2 speakers.4. Both modes are supported, FM mode and Line mode.5. Clock adjustment fuction is also supported.Specification:Condition: 100 percent Brand NewItem Type: MP3 Decoder BoardMaterial: ABSOptional Color: Black, SilverSpeaker Power: 3Wx2Speaker Impedance: 4 OhmsPower Supply: 5V or 3.7V Lithium BatteryBattery of Remote Control: CR2025FM Mode: Use the mode key to switch the machine to fm state(the default state is fm when no usb or sd card is turned on) Last Song: Short press from high to low to search the radio, long press to reduce the volume Play or Pause: Short press to change to the next stored station, long press 3 seconds to perform automatic search and save station Next Song: Short press low to high for radio, long press up for volume.Line Mode: Press mode on the panel to switch the machine to line state. The audio source is input by Line or DC, and the volume is controlled by an external audio source device. The volume can also be adjusted by the previous song and the next song.The adjustment method is also the same as the MP3 volume adjustment.Clock Adjustment: Press the "MODE" on the panel to switch the machine to the clock state, press the play or pause key to select the time or minute, and then the selected part flashes, and then press the previous one or the next one to adjust the time (Note: the time should be adjusted again after starting up each time)..Package List:1xMP3 Decoder Board2x Cable1x Remote Control(including batteries)Note:1. Please allow 1and 8209 3cm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.