The new dremel 8200 cordless multi tool uses lithium ion technology and a 36 mm high power motor to give you the most powerful and versatile tool for any tasks it is perfect for both indoor and outdoor use by simply changing the accessory you can cut and grind almost any materials the set comes with a 1 hour quick charger for short charging times charging status is displayed with 3leds a high performance motor with a speed setting slider lets you vary the speed from 5 000 to 30 000 rpm