The Bosch GLL 3-80 G Professional 360 degree Line Laser projects 3 x 360 degree green lines for excellent visibility. Bright green laser lines offer up to four times better visibility than red lines. High-powered diodes ensure high visual clarity. Its 3 x 360 degree lines allow simultaneous horizontal and vertical levelling for highly efficient work. This tool is designed for various applications including suspending drop ceilings, building floors, installing windows, mounting shelves, laying drainage pipes, building frameworks for drywalls, general construction, and laying tiles. Supplied with: 4 x AA 1.5V LR6 Batteries.1 x Pouch.1 x Laser Target Plate.1 x Carrying Case. Specifications: Accuracy: ± 0.3mm/m.Self-levelling Range:±4 degree.Working Range: 30m.Working Range with Receiver:120m.Laser Diode:500 - 540 nm, < 10 mW.Laser Class:2.Levelling Time:4 Seconds.Power Supply: 4 x AA 1.5V LR6 Batteries (supplied).Operating Temperature: -10-40 degreeC.Storage Temperature: -20-70 degreeC.Tripod Thread: 1/4in, 5/8in.Weight: 0.82kg.