YIKODA 12/16.8/21V Cordless Drill Rechargeable Electric Screwdriver Lithium Battery Household Multi-function Two Speed Power Tools Advantages Introduction: 1>Reversible.Automatic cartridge design. 2>Stepless. 3>25+1 stall torque adjustment. 4>Waterproof, drop, leakage power. 5>ECP: battery protection device to prevent battery overload, overheating and deep discharge. 6>Integrated LED light for illuminating the work area can also be night work. 7>Twisted soft grip handle CST operator to provide excellent grip and a sense of comfort. 8>The fast slow adjustment.