The Cobra S3840V is a cordless scarifier powered by a 40v 5ah lithium-ion battery. As the S3840v is battery powered, you will be able to work around the lawn without trailing cables or stopping to re-fuel. So much quieter and environmentally friendly compared to scarifiers with petrol engines.The S3840V has a 38cm working width with a 14 blade aerator drum and 22 spring tine scarifying drum. The blades will cut into the ground to aerate the soil whilst the tines will rake through moss and thatch to remove it. Debris is collected into the 50l fabric bag.So you achieve the best results, the working height can be adjusted through 5 settings and the working depth from -10mm to +5mm. Weight: 14.5kgManufacturer 2 year homeowner warranty