The Bosch GCL 2-50 G Professional Combi Lasermakes alignment and transfer simple. Highly visible green laser lines and green plumb points give enhanced visibility in brighter environments. The ON/OFF switch and one-button keypad make for ease of use. For starting right away, the GCL’s laser receiver mode is always activated. Its durable design includes a rubberised housing for better protection of the recessed glasses, dust and splash water protection IP 64. The RM 10 Professional enables the precise positioning of laser lines around plumb points. Ideal for many applications such as building framework for drywall, mounting sockets and doors, and point transfer for light mounting. Supplied with: 4 x AA 1.5V LR6 Batteries.1 x RM 10 Professional Rotating Mount.1 x Laser Target Plate.1 x Pouch. Specifications: Accuracy: ± 0.3mm/m.Plumb Point Accuracy: ±0.7 mm/m.Self-levelling Range: ±4 degree.Working Range: 15m.Working Range with Receiver: 50m.Max. Working Range of Laser Points: 10m.Laser Diode: 500 - 540 nm, < 10 mW, 630 - 650 nm, < 1mW.Laser Class:2.Levelling Time:4 Seconds.Power Supply: 4 x AA 1.5V LR6 Batteries (supplied).Operating Temperature: -10-45 degreeC.Storage Temperature:-20-70 degreeC.Dust and Splash Protection: IP64.Tripod Thread: 1/4in.Compatible Laser Receiver: LR 7.Weight: 0.58kg.