Up to 100 Metres of trimming using the 6.0Ah Battery* Trimming 6mm at 4mm deep* The soft-start function minimises start-up shock, and makes the tool start smoothly On/off switch with safety lock and variable speed No Load Speed 10,000-30,000RPM Shaft lock - easy installation and removal of trimmer bit with single wrench by pressing the shaft lock BL Brushless Motor - provides more power to the motor whilst increasing runtime and durability