Greenworks 20312 40V Gmax Digipro Brushless Chainsaw With 4.0Ah Battery And Charger Features Powerful DigiPro brushless motor technology delivers greater performance with up to 100 cuts on a single charge Compatible with GreenWorks G-MAX 40V Li-Ion System for higher efficiency and longer run time with an assortment of tools to complete your yard work 16 in. Oregon Bar and Chain cuts up to 30 in. logs. The longest bar and chain on any cordless chainsaw yet Brushless motor delivers up to 30% more torque for the greatest cutting performance Brushless motor design offers up to 70% less vibration for user comfort while working Chain brake and low kickback chain for increased user safety Electric motor gets you started within seconds and eliminates the hassle of gas pull cords and hazardous fumes Tool-less chain tensioning for quick adjustments so you can get back to the task at hand Compatible Only with GreenWorks G-MAX 40V Battery Models 29462, 29472 and Charger 29482