The cs250 from oregon the worlds only chainsaw with integrated powersharp chain sharpening system is the ideal chainsaw for professionals and home owners alike offering the usability and power of petrol and mains powered chainsaws but without the drawbacks this cordless unit is free from the hassles of wires and refueling costs and runs more cleanly and quietly than its counterpartsthe cs250 is 4 times quieter than petrol saws starts easier with a simple press of the trigger and benefits