DWL200 is a torpedo digital level measuring 8 inches long and 2 inches wide. It displays any angles in % of slope or degrees. This model has accuracy of 0.1 degrees at 0° and 90° and 0.2 degrees at all other angles.A buzzer feature makes audible beep sound at 0°. The hold function will freeze the angle display on the LCD. The unit also has a large magnetic base allowing for strong attachment to magnetic surfaces. The DWL 200 has longer than average battery life and an automatic 3 mins off feature. The strong impact resistance ABS polymer material casing is molded with a tough aluminum base with built in vials.