Emission current: 70X80mA Kit name: HU-064 upgraded electromagnetic gun production kit Power supply method: 2 AA batteries, DC 3V (you need to bring your own batteries) PCB size: A board 85x78mm B board 50x53mm Accumulation current: 50X65mA Working voltage: 3V (The color and shape of the product are random and do not affect use) Colour:Photo Color Material:abs type:A: upgraded version/B:upgraded version with shell Package Contents: 1 X electromagnetic gun DIY kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.