The GRL300HV professional rotation laser is the self-levelling, easy handling rotation laser from Bosch. It is incredibly easy to operate thanks to the one button per function feature and its self-explanatory display. Even shocks and vibrations won't affect your work because of Bosch's shock warning function that prevents levelling errors; this function can also be switched off easily. There is a rotation mode as well as point and line functions for maximum visibility in the workspace. The accuracy rate is unrivalled at 0.1mm/m ensuring quality you can rely on. The unit can even withstand drops from a height of up to 1m, as well as IP 54 dust and splash protection, meaning you know the Bosch unit is just as tough on site as you are. There is even a plumb and reference beam for quick alignment. The laser diode is 635 nm, < 1 mW (class 3R); the system can operate in temperatures between -10 - 50 °C and can be stored at temperatures between -20 - 70 °C. It has a 300m diameter working range when coupled with a receiver and a 60m diameter working range when used without. Its self levelling range is 8% and its levelling time a mere 15 seconds. This product comes complete with 1 x NiMH battery, 2 x 1.2 V HR20 (D), 2 x 1.5 V LR20 (D), battery compartment, carrying case, charger set with adapter, holder, LR 1 professional laser receiver, laser target (red), laser viewing glasses (red), RC1 professional remote control, WM 4 professional universal mount. Rotation speed - 150, 300, 600 rpm Power supply - 2 x 1.2 V HR20 (D) (9 Ah), 2 x 1.5 V LR20 (D) Operating time, max. - Rechargeable batteries (NiMH) 30 h Tripod thread - 5/8" Weight, approx - 1.8 kg Colour of laser line - red GR 240 Professional Measuring Rod The Bosch GR 240 Professional Measuring Rod is the perfect tool for all floor height measurements. It is rugged, robust and high-quality, constructed of aluminium and extendible up to 2.4m. Appropriate for GLL 2; GLL 3-80 P; GLL 2-80 P; GLL 2-50; GRL 400 H; GRL 300 HV; GRL 300 HVG; BL 200 GC; GOL 20 G/D; GOL 26 G/D Professional.  Length 2.4m 2 sections Units of measure in m/cm Aluminium material BT 170 HD Professional Building tripod Quick locking due to Quick-Clamp-System High resistance to environmental influences 5/8" thread adapter Work height - 107 - 165 cm Weight, approx - 5.5kg Tripod thread - 5/8"x11