User Benefits: Safety Paddle Switch. Electronic current limiter for overload protection. Soft start feature. Anti-restart function. Electric brake. Battery fuel gauge. Rubberised soft grip. Automatic Speed Control: Automatically changes the cutting speed according to load condition for optimum operation. High power motor. Equipped with Battery protection circuit: designed to protect the battery from damages due to overdischarge, high temperature or overload current. Kickback user protection: Shuts down the tool to protect the user if rotation speed suddenly slow down (e.g. kickback). Specification: Voltage: 18v Bore Diameter: 22.23mm Max Wheel Thickness: 6.4mm Noise Sound Pressure: 79 dB(A) Noise K Factor: 3 dB(A) Max Wheel Diameter: 125mm No Load Speed: 8,500/rpm Vibration K Factor: 1.5 m/sec² Vibration Surface Grinding: 6.0m/sec² Vibration Disc Sanding: 2.5m/sec² Net Weight: 2.6kg