1 TM2803 Last USB SD audio module 2 LCD display 3 IR ... 4 MP3/WMA/USB/SD 5 Board size:88*36mm TM2803 Last USB SD audio module1, Functions instructionFull functions, high quality1 ... .3,Relating parametersMainboard Dimensions: 88*36mmVoltage: AC 9VElectricity: (Max) 150mA TM2803 Last USB SD audio module