Laser distance measurer (LDM) manufactured to withstand the inevitable drops, falls & knocks on the job site. Durable mechanism & rubber over moulding ensures enhanced durability for tough job site conditions. It has a range of up to 40m & at this distance the unit will have an accuracy variance no greater than 3 mm. Raised, oversized buttons to avoid miss measures. Automatic backlight to aid the clear reading of measurements. Standard Equipment :2 x 1.5V DC LR03 (AAA-size) batteries, hor