Smooth stepless adjustable speed model (300-8500 rpm). Thanks to the fast therapist, the work is safe. The lower layout switch provides additional safety. if desired. that the device stops. if it escapes during processing. Efficient and durable brushless motor. Easy-to-hold body. Overload protection protects the motor. Works with 18 V Li-ion batteries (does not work with 1.3 Ah battery). The tool and the battery are equipped with a protection system. The system automatically shuts off the power to the tool. to extend battery life. Bluetooth support allows all Makita vacuum cleaners with Bluetooth to be used simultaneously.Technical information: Brushless motor Battery protection system Speed ​​(min-1) 3000-8500 Spindle thread M14 Bore size (shaft diameter) 22.23 mmDisc diameter 125 mmReset prevention function (NVR switch) Toggle switch (permanent) Vibration- protected side handle AVT Grinding wheel Direct socket Sound pressure level (LpA) 79 dB (A) Indeterminate noise (K factor) 3 dB (A) Vibration level (3 axes) 5.5 m / sec²Undetermined vibration (K factor) 1.5 m / sec²Weight with standard battery (EPTA- Procedure 01/2003) 3.1 kgDimensions (LxWxH) 382x140x151 mm