Dewalt DCD771C2 20V MAX Cordless Lithium-Ion 1/2 inch Compact Drill Driver Kit Compact, lightweight design fits into tight areas High performance motor delivers 300 unit watts out (UWO) of power ability completing a wide range of applications High speed transmission delivers 2 speeds (0-450 & 1,500 rpm) for a range of fastening and drilling applications 1/2" single sleeve ratcheting chuck provides tight bit gripping strength Ergonomic handle delivers comfort and control *Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18. Battery capacity: 1.3 Ah Compact, lightweight design fits into tight areas High speed transmission delivers two speeds (0-450 &amp; 1,500 rpm) for a range of fastening and drilling applications Ergonomic handle delivers comfort and control High performance motor delivers 300 unit watts out (UWO) of power ability completing a wide range of applications 1/2&#034; single sleeve ratcheting chuck provides tight bit gripping strength