Straight Red Line Laser (Industrial Use Line Laser) Quarton Laser Module, 55. High quality Red Straight Line Laser, for Industrial leveling, alignment, adjusting, positioning, measuring and targeting device. Wood processing. Metal processing. Stone processing. Textile industry. Food industry. Automotive industry. Medical science. Red Line laser. Wave length: 635nm. Laser power output : Class I ? less than 0.39mW. 3~6 VDC operation. Dimensions: D10 x 38 mm. Fan Angle : 60. Laser beam is focused at 10 meters to generate best thin laser line from 5 meters to 20 meters. This module has integrated optic, red laser diode, and APC driver circuit. APC driver circuit enables the Laser power output safe and constant. Red Laser Diode for large temperature operation range. Please note: laser modules are not supposed to be sold with any power source, power supply, base for plugging, or wiring terminals. Because modules are simply components, and it means that you have to wire it to your own power source by yourself.