Feature: 1. Mainly used in grayscale engraving, drawing, simple depth engraving, simple cutting, etc. 2. Especially good at grayscale engraving, depth of engraving 0.5-1mm, cutting 0.5mm, unable to engrave metal. 3. Supported engraving materials: Wood, gray paper, leather, bamboo, blackening plastics, rubber, PCB, etc. 4. The power can be adjusted by PWM. 5. Built-in drive protection circuit including surge protection, overvoltage protection for safety use. Specification: Item Type: Laser Module Interface Specification: 4pin PH2.0 (red: 12V, black: GND, yellow: PWM, green: temperature signal) Wavelength: 405nm Radiator Size: Approx. 30x60mm / 1.18 x 2.36in Material: Copper + Aluminum Weight: 130g Drive Position: Built-in Power: PWM adjustable Drive Protection: Surge Protection, Overvoltage Protection Input Power: Approx. 12V 280mA (including fan power) Line Length: Approx. Approx. 300mm / 11.8in Control Line Installation Method: Integrated Fan Size: Approx. 30x10mm / 1.18 x 0.39in Fan Speed: 10000rpm Controllable Temperature: