Bosch GRL 500 H + LR 50 Professional Rotation Laser FEATURES The first rotation laser with theft protection for all levelling work Theft protection: an alarm is triggered if the GRL 500 H/HV is moved without the LR 50 Professional during operation Simultaneous charging: the Li-Ion batteries in both components are charged together in very little time Calibration reminder: automatically indicates possible calibration requirement Relative height display: distance between where the laser beam hits the reception area and the centre of the receiver Slope function: enter slope values directly and precisely using the LR 50 Professional keypad Anti-Drift System: prevents levelling errors in the event of shocks or vibrations Sleep mode: longer operating time while retaining the setting Centre Line button: automatically aligns the laser beam with the centre of the receiver and measures the slope value SPECIFICATION Laser Diode: 635 nm < 1 mW Operating Temperature: -10 – 50 °C Storage Temperature: -20 – 70 °C Laser Class: 2 Working Range with Laser Receiver: 500 m (Diameter) Working Range without Receiver: 20 m (Diameter) Accuracy: ± 0.05 mm/m Horizontal Self-Levelling Range: ± 5,7° (10%) Levelling Time: 15 s Dust and Splash Protection: IP 56 Rotation Speed: 600 rpm Power Supply: 4 x 7.4-V-Li-Ion Operating Time Max: 25 h Tripod Thread: 1 x 5/8\" Weight Approx: 2.3 kg Length: 234 mm Width: 217 mm Height: 194 mm Colour of Laser Line: Red Projection: 1 x 360° Line