Sealey Inclinometer Digital with Laser AK9991Digital inclinometer with laser line and four magnetic sides for measuring angles and tilt percentages on metal and other surfaces. Wide range of uses including setting suspension camber and caster, collision avoidance bumper mounted radar and parking assist systems. Absolute zero measure on any flat surface with accuracy 0. 2 and measuring range 4 x 90. Large backlit LCD display makes it easier to see in a low lit environment. Power supply 3. 7V