Quantity One Laser color green light Laser wavelength 505~550nm Working distance 30M Working hours First gear 7 hours Second gear 10 hours Third gear 13 hours Fourth gear 16 hours Detection range automatic leveling, 41 Level accuracy +3MM/10M Horizontal and vertical expansion angle >130 Storage temperature -10~50C Battery 2 AA batteries Operating temperature range -25 C~70 C Laser class CLASS2 Weight 220g Size 82*57*8OMM Red and green light laser level meter, using imported Osram laser tube, the red and green light laser Red/green light is highlighted and the display is clearly visible indoors. Pulse mode (used when there is strong light outside) Turn on the mechanical switch, press and hold the power supply for about 2 seconds, the indicator light above the power supply flashes and enters pulse mode (up to 35 meters in any strong light conditions) Slash at any angle Performance marking lock, with bracket and adapter can rotate freely 2 ways to start Short press the power button and the mechanical switch to be in the unlocked state, both can control the laser switchGood quality product