The Bosch GLL100-42GL 3.7 V green-beam self-leveling cross line laser pairs remarkable power flexibility with green-beam technology to emit lines up to 4X brighter than standard red beams. Use with the included rechargeable 3.7 V Li-ion 3.0 Ah battery or AA batteries for enhanced versatility and longer runtime on the job. The included USB-C cord even provides the option to charge the tool while in use for greater flexibility and efficiency. Built-in VisiMax™ technology monitors temperature and power consumption to deliver the brightest line for the job, optimize energy efficiency and provide long term tool reliability. Full rubber overmold housing helps protect the level at every major impact point. IP65-rated, the laser can withstand tough, rainy conditions and is dust tight for enhanced protection. The U-shaped laser outlet window provides a wider horizontal reach of the laser line. With a working range of up to 100 ft the bright, thin lines provide an accuracy of 1/8 in at 30 ft. Equipped with a smart pendulum system, the tool self-levels, will indicate any out-of-level condition and then locks when switched off for secure transport. Keep a handle on the laser with the rubber grip base and easily position using the strong magnets or 1/4 in threading mount. Complete with an outstanding operating time of 8 hr (using a Li-ion battery), for all-day power and productivity.