This Greenworks GD40BC 40 V battery-operated brush cutter is perfect for light-duty trimming jobs around the house. The string trimmer has an adjustable 2 mm dual line trimmer head with a bump line feeding system. You can also swap between the trimmer head and the included 25 cm brush cutter blade. The brushless motor delivers unmatched power and longer run times. Its top-mounted design, combined with a steel straight shaft, allows for perfect balance. With a variable speed trigger, you can easily control the speed to suit your taste. Please note the GD40BC brush cutter requires an additional 40 V - 2 Ah/4 Ah battery and a 40 V universal charger, both of which are not included! All the Greenworks battery-operated tools in the same voltage range can use the same battery, so you only need a single 40 V battery to power them! However, with two batteries, you can keep working for longer by charging one battery while the other is in use. Very convenient!