La description

Accuracy： ±1mm/5m
Self-leveling range：±2.5°
Working distance： Radius: approx.*0m(indoors),Radius: approx.*0m(using the detector)
Line laser wavelength ：**5nm(Red Line), Super light
Function: 1V1H, 2V1H, 4V1H ( Down point)
Safety Class: less than 1mw（Class II）
Working temperature：－*0℃*-＋*5℃
Laser Standard Class â…¡
Power：3.7V Li-ion battery/4AA Batteries(6V)
Continuously working time:       Approx8 hours（All diodes light）