The DEWALT DCE089 Green Multi-Line Laser projects 3 x 360° self-levelling lines that will cover the entire room. It has a variable blink sequence for manual mode and a full-time pulse mode that allows use with a detector. The green laser diode provides full brightness for increased visibility and extended working range. A fine adjustment knob provides increased precision and accuracy. There is also a locking pendulum to help prevent damage to internal components. It can be powered by 12V or 18V DEWALT XR Li-ion slide-type batteries for extra-long run time and flexibility. Specification: Laser Class: 2 Level Accuracy: ± 3mm @ 10m Working Range: 30m (50m with detector) Thread: 1/4in and 5/8in Weight: 2.2kg (without battery)