Self leveling cross-line laser uses green-beam technology, which generates lines up to 4 times brighter than standard red beams. This gives the laser a working range of up to 100 Ft. with an accuracy of +/-1/8 In. VisiMax Technology provides maximum line visibility in standard working conditions. Long vertical laser line extends line visibility behind the tool to almost 360 degree vertical plane when placed next to a wall. Easy-to-use laser setup modes project vertical, horizontal and cross lines. Lines can be projected separately or together for a variety of level and alignment applications. Smart Pendulum System allows tool to self-level, and it indicates out-of-level condition to ensure an accurate layout. The pendulum locks after the laser is switched off for secure transport. Robust over-molded construction protects against dust and water. 1/4'-20 and 5/8'-11 mount threading. 14 deg F to 122 deg F operating temperature. 4.4 In. x 2.2 In. x 4.2 In. Weight: 1.08 Lb. (pound). Includes positioning device, laser target (3) AA batteries, carry case.