Operating Voltage: 12 V DC. Laser Focal Length is not adjustable, focal length is 2cm. Working Temperature: -40 to 75.Tips: This 15W fixed-focus laser can be engraved on stainless steel surface and anode colored aluminum surface, and can cut 3mm wood. Wiring display clear, power supply, control panel, laser, correct wiring sequence. (Red line "positive line" black line "negative", not the shop matching control board, wiring method and customer service confirmation). (turn on the power switch behind the laser before testing). Fixed focus laser installation test to determine the distance between the laser head and the object being engraved, within the adjustable focus range of the laser. (Blue housing only, 5.5w adjustable focal length within 3mm, 15w fixed focus 1.8cm fixed focus column height). Before focusing engraving, make sure that the laser aperture is the smallest point in the focus range, ensuring laser output power and accuracy. EngravingIn the case of normal working of the frame, adjust the engraving method (line engraving/point engraving), laser intensity, engraving speed, point distance and line spacing, and point engraving time for the material and style of the object to be engraved. To achieve the best engraving effect. Usually it cost about 35USD-50USD. The item "15W 450nm Blue Laser Module Laser Cutting Module For DIY Laser Engrave 3mm sz//" is in sale since Friday, February 15, 2019. This item is in the category "Business & Industrie\Sonstige Branchen & Produkte\Graveurausstattung". The seller is "outstandingdeal" and is located in . This item can be shipped worldwide.