Sell 30W Focusable Laser Module 8pcs Universal Laser Engraving Module Kit with 450nm 7.5W Blue Laser Head PWM/TTL Modulation for Engraver Cutter 3D Printer CNC Milling Replacement for Arduino Compatible with TTL & PWM Modulation best price

A more powerful, safer and smarter laser module kit for engraver, 3D printer, CNC mill and replacement for Arduino project. Features: - Designed for laser engraver machine, laser cutter, 3D printer, CNC millling, replacement for arduino project. - 2 in 1 focus, adjustable lens and fixed focal length in one module. - 7.5W blue light laser, suitable for engraving and cutting. - More Safety, built-in protective glass to protect eyes! Even without wearing protective glasses, the operation is more comfortable. - Modified laser air assist, avoid smoke damage to the lens. - More quiet, intelligent drive adjust the cooling fan speed according laser temperature. - Easy to use. Digital PWM wave pulse signal generator adjustable frequency duty-cycle board replacement for NEJE laser module.  - Sliding slot is provided for easy adjustment of focus. - Engrave a wide range of soft materials: MDF/Balsa/Paper/Wood/Fabric/Plastic/Leather/Plywood/Foam Paper/Anodized Aluminum.  Note: *12V3A power supply and goggles are not included in the kit. *Can Engrave: MDF/Balsa/Paper/Wood/Fabric/Plastic/Leather/Plywood/Foam Paper/Anodized Aluminum  *Can Not Engrave: Metal/Glass/Stone/Ceramics/PCB/Stainless Steel/Reflective Material/ Transparent Material  *Smoke will be generated when burned, please pay attention to smoke exhaust indoors.  *Please wear laser goggles during usage and avoid touching the laser directly with your eyes and skin!  Specifications: Material: Aviation aluminum, brass Laser Color: Blue Module Input: 20-30W  Optical Power Output: 7.5W (7500mW) Wavelength: 445-450nm  Beam Shape: Dot (Focusable)  Working Voltage: DC 12V  TTL&PWM Modulation: YES, compatible with Both TTL & PWM Modulation  Input Voltage: DC12V 3A PWM/TTL Input: DC3.3V-12V   Input Interface: PH2.0-4Pin (+,-, PWM/TTL, Temperature), 3Pin (+,-, PWM/TTL) , 2Pin+2Pin (+,-) + (PWM/TTL,-)  NOTE: Temperature interface can be disconnected, the text instructions replacement for NEJE for temperature acquisition can be found on wiki.  Drive Mode: External ACC  Safe Temperature Range: <60 ℃  Module Weight: 202g (The lighter the weight, the smaller the move inertia, the better the performance)  Life Time: 10000 ~ 20,000 hours Cooling Mode：Temperature sensor intelligent control + 10000 rpm 40mm cooling fan Section Size: 40*40mm Adapter Plug: 5.5 2.1 port Item Size: 6*4*4cm / 2.36*1.57*1.57in Package Size: 16*11*6cm / 6.29*4.33*2.36in Package Weight: 320g / 11.28oz Packing List: 1 * 30W Laser Engraving Module  1 * Laser Module Sliding Slot 1 * 4 Pin Cable(320mm Cable)  1 * Interface Adapter Board 1 * 2.5mm Allen Wrench  1 * 5mm Allen Wrench  1 * 3pin Input Cable 1 * 2pin TTL Cable