The Bosch GLL 20-22 G Professional is a rugged, easy-to-use green line laser built for a wide range of interior levelling and alignment tasks. Its robust design features an IP65 rating and rubber-reinforced housing, offering exceptional resistance to dust, water, and jobsite impacts ensuring reliable performance in challenging environments. The innovative U-shaped laser window provides an extended horizontal fan angle for broader coverage and greater flexibility. Powered by a dual power system, you can seamlessly switch between the high-capacity BA 3.7v 3ah XL li-Ion battery and standard AA alkaline batteries, minimising downtime and maximising efficiency. Even better, the li-Ion battery recharges while in use, keeping your workflow uninterrupted. Features and Benefits IP65 rating and rubber enforced housing for dust and water resistance U-shaped laser window for a wider fan angle of the horizontal line Dual power source lets you switch between BA 3.7v 3ah li-ion batter and AA alkaline batteries to eliminate downtime Specifications Battery Voltage: 3.7v Power Supply: 1 x BA3.7v 1ah Li-Ion, 4 x 1.5v LR6 AA Laser Diode: 500-540nm,.