The Bosch GCL 2-50 Professional Combi Laser is compact and versatile, ideal for all levelling applications. It projects horizontal and vertical laser lines and two centred plumb points with optimal visibility. Use the RM 1 Professional Rotating Mount for aligning the laser lines and for versatile mounting of the tool. Receiver mode allows you to work with the Bosch laser receiver LR 6 and LR 7 for a working range up to 50 metres. Supplied with: 3 x AA 1.5V LR6 Batteries.1 x LR 6 Professional Laser Receiver.1 x RM 1 Professional Rotating Mount.1 x Bracket for LR 6/7 Laser Receiver.1 x Ceiling Clamp.1 x Laser Target Plate.1 x 1/2 L-BOXX inlay for tool.1 x Carrying Case. 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.