The Trillium Wireless Tattoo Pen with Digital Display Control. 5 Grips Included - 1.1" inch aluminum grip, 1.25" inch aluminum grip, 1.35" inch aluminum grip, 1.25" Inch rubber handle grip, & 1.35" Inch rubber handle grip. Only the aluminum grips are autoclaveble. Built in Battery - 5-8 hour run time depending on work load. It take 2 hours for full charge. Pen Material - Aircraft aluminum. Motor - MATSU B5 Motor Voltage - 5 to 12 Volts Digital Display - 1st light show voltage (85 = 8.5 volts). 2nd light shows battery life (75 = 75% battery life). 3rd light shows working time (125 = 125 min) Needle Swing - 3.5mm Swing and adjustable with twist of the grip. Weight and Length - 6oz and 5.5" inch.