Characteristics: 12V tool speed switch, Using a 10.8V lithium battery, Switch model EGD-1112B, 12a, This protection switch is relatively new, Many newer electric screwdrivers have similar styles, Great value for DIY modification and repair, The measured voltage range is 9-13V, Charge indicator and lighting lamp. Well the job change, The power tube uses patched 100A30V IR tube, The internal resistance of this tube is very small, All integral heat sinks do not need to be too large, Wiring with temperature sensing line, It can be replaced by a 10K resistor, Push switch type stepless speed regulation, Support forward and backward switching, The specific wiring is marked in the following figure. Package includes: 1PCS x Speed switch Note: 1. No Retail Sale. 2. Please allow 0-1cm error due to manual measurement. Please make sure you don't mind before you bid. 3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!