This Rockwell Heavy Duty Drywall Screwdriver Model 770 is a powerful tool with a 115V power source and 3.5Ampere rating, delivering a speed of 2500 rotations per minute. It is a reliable and efficient tool for drilling drywall screws without causing any damage to the wall. The screwdriver is designed with a heavy-duty feature, making it a perfect tool for any construction work. It comes with a corded electric design, ensuring that it can be used for a long period without any interruption. The product is made in the USA in Pittsburgh, PA adding to its quality. Tested works!!!