Bosch Dual Plane Leveling Laser with BM1 Positioning Device GLL 2-80 VERSATILE: The Bosch GLL 2-80 offers one 360 degree horizontal plane and one 360 degree with manual mode for all jobsite conditions. SELF LEVELING: With Boschs Smart Pendulum System the alignment laser self levels and indicates out-of-level condition and locks when switched off. EXTENDABLE: With the included Bosch LR2 Line Laser Receiver and Boschs Pulse Laser Receiver Mode, users can extend the alignment by up to 265 feet in bright-light conditions CONVENIENT: The Bosch GLL 2-80 features a simple to use single button operation with little training requirements. The 90 degree horizontal and vertical bright red laser layout lines and electronic self-leveling make the GLL 2-80 easy to use. Class IIa laser product, &lt;1mW power output Class II laser product, &lt;1mW power output