Specifications:

Beam Type
Laser Dot: Four 650 nm laser diodes 2.5 mw maximum (Class 3R)
Chalkline: 635 to 650nm (Class 2M)

Operating Range
100 feet (30M) interior visible range
Chalkline: 30 feet (9m) (Dependent on ambient light)

Indicating Features
Low Power: Laser blinks 4 times every eight seconds
Out of Level: Laser blinks rapidly

Accuracy
± 1/4" @ 100 feet (± 6mm @ 30M)

Line Accuracy
± 3/32" @ 10 feet (end to end)
(± 2mm @ 3M)

Battery Life
± 15 hours intermittent use
3 "AA" Cell Alkaline batteries

Weight
Laser: 1 lb. 3.2 oz. (545g)
Mount: 7.1 oz. (202g)

Warranty
1 Year