The Bosch GLL 2-15 G Professional Line Laser is the simple way to achieve accurate results. An ON/OFF switch and one-button keypad make for ease of use. Vertical and horizontal green laser lines increase visibility in brighter environments. The durable design incorporates a rubberised housing for better protection of the recessed glasses. It's also dust and splash proof to IP64. This line laser is the perfect choice for applications with short working ranges, such as installing suspended drop ceilings, hanging shelves, laying drainage pipes, and aligning lights. Supplied with: 4 x AA 1.5V LR6 Batteries.1 x LB 10 Universal Mount.1 x Pouch.1 x Laser Target Plate. Specifications: Accuracy: ± 0.3 mm/m.Self-levelling Range:±4 degree.Working Range: 15m.Levelling Time:4 Seconds.Power Supply: 4 x AA 1.5V LR6 Batteries (supplied).Operating Temperature: -10-50 degreeC.Storage Temperature:-20-70 degreeC.Dust and Splash Protection: IP64.Tripod Thread: 1/4in.Weight: 0.57kg.