The Cobra S3840v is a 2 in 1 scarifier and aerator powered by a 40v battery system, offering plenty of power. Easily switch between modes, change operating heights and the angle of the handles to suit the operator. The S3840v has a working width of 38cm (15in) and is ideal for removing thatch, moss and generally improving the health of your lawn. Use the aerator module to improve drainage and improve root development, but is also excellent for preparing the lawn for over-seeding. The battery (40v 5Ah Samsung cells) and charger are included.