The Bosch GLL 3-80 C Professional 360 Line Laser projects 3 x 360 lines for excellent visibility. Innovative CAL Guard monitoring and a Bluetooth connected smartphone app allow for remote-control use as well as contactless adjustments and high precision. High-powered diodes ensure high visual clarity while its 3 x 360 lines allow simultaneous horizontal and vertical levelling for highly efficient work. This line laser is developed for building floors, installing windows, mounting shelves, laying drainage pipes, building framework for drywall, and laying tiles. It is capable of levelling itself on non-level surfaces up to +- 4 in less than 4 seconds with excellent precision. This line laser is compact, easy to handle, and extremely robust. Due to the GLL 3-80 C Professional's Dual Power Source, it can be operated both with 12 V Li-ion battery and with standard alkaline batteries for added flexibility. Supplied with: 4 x AA 1.5V LR6 Batteries. 1 x AA1 Alkaline Battery Adaptor. 1 x Laser