The product is mainly composed of a demonstration board 1 sets, 5 sets of electrolyzer, lamp etc.. The demonstration board seat is made of ABS engineering plastic, which is provided with a socket 5 and socket, wiring terminal, wiring diagram printed on the demonstration panel, a demonstration board seat size 360 x 140 x 260mm; electrolytic cell by a transparent box, a box cover and a connecting wire electrode, etc.. Products use the power supply voltage: 4V ~ 6V.