Features: This item is a necessary accessory for DIY engraving machine. It is a professional laser head with high speed and high stability. Bright blue-violet light, makes it easy for locating when engraving. Adjustable laser head is easy to adjust,and ensure engraving with good quality and high efficiency. 100mW, 180mW, 500mW three output optical power are available Specification: Model: M12A 5V Product category: laser module (laser head) Band range: visible light Working material: semiconductor Laser wavelength: 45nm(blue-violet light) Spot type: dot (adjustable focusing) Output optical power : 100mW,180mW,500mW (optional) Drive mode: external ACC constant current drive Heat dissipation: natural heat dissipation Working voltage: 5V DC Shell material: anodic black on aluminum surface Module material: copper Weight: Approx.56g/2oz Package list: 1 * Laser Head 1 * Screwdriver 1set * Screws Required reading for users: 1. The power of the laser module is relatively large, which is only used in industrial occasions. It is forbidden to illuminate the eyes. 2. Keep children away from the laser products. 3. Do not open the module to avoid damage.