Laser Distance Meter  LDM-100 Portable Laser Distance Meter takes instant & Reliable Measurement up to 100 Meter & is easy to operate. The laser distance meter is used for accurately determining the distance of an object or span without contact by way of a laser. The basic measuring principle is based on measuring the transit time of laser pulses between the laser distance meter and the object to be measured. Power Supply : 2 X 1.5 Volt AAA Size Batteries. Battery Life : Approx. 5000 Measurements. Unit Size : 120 X 50 X 30 mm. Display Size 32 X 32 mm. Weight : 110 gm(Including Batteries). Accessories : Instruction Manual, 2 pcs 1.5V Batteries, Carrying Case, Reflector Panel.