Two gears can not be used at the same time or it will get burned Charging: 3 holes are separately. Each hole is for about 30 minutes one by one. When all three holes are , the whole battery is fully . When the indicator light of the charger, green light, is off, it means that it is fully Pay attention to the use time: do not use it for more than 10 seconds each time. Use it for 3 times continuously. Take 20- to cool down the instrument. Prevent it from burning out due to high temperature Principle: The EMP Generator produces a high-frequency electromagnetic wave field. An energy-saving lamp around the generator induces electromagnetic waves and generates an electric current. When the electric energy is sufficient, the bulb will light up. Plug Type :EU Plug,it applies to Indonesia, Germany, France, , Italy and so on. Voltage: AC 220V Colour:black Material:plastic Package Contents: 1 x Machine 4 x Accessories 1 supply (EU) 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.