1 input: DC 4.5V–7V (the input voltage must be more than 1V higher than the output voltage. ) 2 specially designed 2 fixed pin hole, can be directly fixed on the hole plate expansion experiment; 3 output: 3.3V, 800mA (load current can not exceed 800mA) 4 double panel design, the layout is beautiful and generous; 5 input and output using 2P single row pin, convenient connection; 6 PCB plate size: 2.5cm*1.1cm