The Bosch GLL 3-80 C Professional Line Laser offers high precision due to the innovative CAL Guard monitoring and Bluetooth® connection to your smartphone for remote control use and contactless adjustment of the tool. High work efficiency due to 3 x 360° lines: Simultaneous performance of horizontal and vertical levelling applications in the entire room with only one tool. Dual Power Source: Can be operated both with 12 V LI-ion battery and with standard alkaline batteries. Self-levelling (±4° in <4 sec), very precise (± 0.2 mm/m) and range of up to 120 m with LR 6 or LR 7 Professional receiver.