Dotting Laser Module Standard Dimension: 8×18.5mm Fixed focus, single, circular light shape, continuous working time over 5000hours. Specifications: Wavelength: 650nm Power: Class II P<1mW Trigger Voltage: 2.3V Working Voltage: 4.5V Working Current: I<40mA Working Temperature: -10℃--+50℃ Storage Temperature: -20℃--+60℃ Size of Light Spot: <10 at 5m Function: Industrial grade, can be used as laser light source of positioning instruments and equipments, laser distance finders, laser levels, laser line markers( laser line projectors), laser sightings, laser level bars and so on photoelectric products.