Palm grip for comfort and control. Dust-protected on/off switch. Oversized spring-loaded paper clamps for quick and easy paper changes. Flush sanding on three sides. Die-cast aluminum base for durability. Rated voltage: 120V AC, 60 Hz. Rated input power: 1.3 amp. Pad size: 4-1/4 x 4. No-load speed: 10,000 OPM. Dust collection through pad.