The 14″ Worx WG384 combines two 20V Power Module batteries to deliver 40V Power and Performance. At 10 lbs, this performance-minded green machine weighs considerably less than comparable gas models. The patented tool-free auto chain tension system prevents over tightening and keeps optimal chain tension while cutting. Combined with an automatic oiling system with indicator this saw is ideal for pruning, limb cutting, and tree maintenance. Being a part of the 20V Power Share program allows endless possibilities to share batteries with many other tools. FEATURES: Dual 20V Power Module batteries delivers 40V Power and Performance. Dual 20V Power Module batteries delivers 40V Power and Performance. Highly efficient brushless motor design for long lasting power. Patented auto-tension chain system for extended bar & chain life. Quick-stop chain brake to help prevent accidental cutting Automatic chain lubrication with oil lever indicator. Chain speed 26 ft/s, Chain pitch 3/8 , Number of chain drive links 52″,Chain gauge .043″.