The GLL 3-80 Professional is perfect for fast self-levelling and it is capable of self-levelling on non-level surfaces up to +/- 4° in less than 4 seconds The line laser GLL 3-80 Professional projects 3 x 360° lines for next level visibility. High visual clarity is provided by high-powered diodes. This tool\'s 3 x 360° lines allow for simultaneous horizontal and vertical levelling applications around the entire room for highly efficient work, while the tools intuitive user interface offers easy operation. This line laser was developed for suspending drop ceilings, building floors, installing windows, mounting shelves, laying drainage pipes, building framework for drywall, and laying tiles. The GLL 3-80 Professional is perfect for fast self-levelling and it is capable of self-levelling on non-level surfaces up to +/- 4° in less than 4 seconds with excellent precision of ± 0.3 mm/m*/**. It has a working range of up to 120 m when using the optional LR 6 or LR 7 Professional receiver (not included). This line laser is compact, easy to handle, and extremely robust (IP54). Comes in a Pouch with Target Plate and Batteries inside a Carry Case. Features: High visual clarity is provided by high-powered diodes 3 x 360° lines allow for simultaneous horizontal and vertical levelling applications for highly efficient work Intuitive user interface offers easy operation Comes With: 4 x 1.5 V LR6 batteries (AA) Laser target plate Pouch Carrying case Specification: Laser diode: Line: 630 - 650 nm, < 10mW Operating temperature: -10 – 40 °C Storage temperature: -20 – 70 °C Laser class: 2 Working range: up to 30 m Working range with receiver: up to 120 m Working range without receiver: up to 30 m Accuracy: ± 0.3 mm/m*/** (*for the four horizontal intersection points; **plus use-dependent deviation) Self-levelling range: ± 4° Levelling time: 4 s Dust and splash protection: IP 54 Power supply: 4 x 1.5 V LR6 (AA) Operating time (max.): 4 h in 3-line mode Tripod thread: 1/4\", 5/8\" Weight, approx.: 0.82 kg Colour of laser line: red Projection: 3 x 360° line Compatible laser receivers: LR 6 + 7