Hitachi GP10DL Cordless 12-Volt Peak Lithium-Ion Variable Speed Rotary Tool With 40-Piece Accessory Set Powered by a 1.5 Ah Lithium Ion battery for longer total battery life, lighter weight and a steady level of power throughout the charge Variable speed dial allows the user to control the ideal speed from 5,000 to 35,000 RPM Compact and lightweight- a mere 8-3/16" in length and 1.06 lbs to fit into tight spaces Built-in LED light for superior visibility even in the darkest workspace Innovative anti-vibration system for increased comfort and total control Slim soft grip handle increases comfort and reduces fatigue Low battery indicator light warns the user when run time is getting low Short charge time- just 40 minutes for more productivity Covered by Hitachi's Lifetime Lithium Ion tool warranty and two-year Lithium Ion battery warranty