Compatible with master 2/2s, plus, mix, max machines

With adapter(laser pwm tester / laser switch board ) board, support 3d printer, cnc laser machine, other brand laser cnc machine, arduino project.



This product is designed with anti-static protection!

Please wear protective glasses before operation!

Please do not touch the laser outlet with your hands. It may burn your hands!

Children under 14 years of age are prohibited from using this product!

Children over 14 years of age need adult supervision when using this product!



Important Notice

At present, all laser modules of NEJE will pass rigorous aging tests to ensure no attenuation of power and ensure that each radiator can control the temperature within the standard range for a long time. It can be used continuously without any time restrictions. The cheap lasers bought on the market do not have diode caps. NEJE has key core technology to control the effective life of the laser diode to 10,000-20000 hours, and promises a 2 year warranty! If your laser have problems, You can get it for free from the store you purchased, or contact the official service

The 20W lens has been updated. You don’t need to purchase lens to replace it. The new lens can adapt to engraving and cutting at the same time.


Huge copper core, 15000 rpm high speed fan, large area heat sink, ensuring long working hours at full power, temperature can be checked at any time, the temperature can be controlled in a safe range, and the warranty time is 20,000 hours.

Built-in high-performance driver, safe and reliable!

The NEJE team continuously optimizes the optical system to make the optical power loss less than 1%, the focus point is clear, and the maximum cutting thickness can reach 8mm with the correct focus adjustment.





If you don't need temperature sensing, you don't need to connect, you can use 3pin control directly, this is that you need to make a little modification to the line. 3PIN:(12V-GND-TTL)or 4PIN:(12V-GND + TTL-GND)

nejetool.oss-us-west-1.aliyuncs.com_wiki_module_20w_interface3.jpg nejetool.oss-us-west-1.aliyuncs.com_wiki_module_20w_007.jpg nejetool.oss-us-west-1.aliyuncs.com_wiki_module_20w_008.jpg



1. The third yellow interface line is the TTL control line, the voltage range is 3.3-12V, the frequency is 0-20KHz, and it needs to be grounded.

2. The input voltage of the red and black wires is 12V3A - 12V5A, do not connect them in reverse, otherwise the module will be damaged.

3. The power is not controlled by voltage or frequency, it is controlled by duty cycle.



Please make sure the lens surface is clean, avoid smoke from getting on the lens when using it, keep it in a box when not in use, avoid dust, keep it dry.

If the inside of the lens is stained with dust or smoke, it may cause the lens to break, because the high-power laser will cause the lens surface to crack.


The NEJE module provides a 2-year warranty. The lens is not covered by the warranty. If you disassemble the module, it will no longer be covered by the warranty. If there is a quality problem with your module, please contact the customer you purchased.


Main applications: cutting, drawing  etc.
Interface specification: 4pin PH2.0 (red: 12V, black: GND, yellow: PWM, green: temperature signal)
Wavelength: 450nm
Radiator size: 30*80mm
Material: copper + aluminum
Weight: 202g
Drive position: built-in
Is the power adjustable: PWM can be adjusted
Drive protection: surge protection, overvoltage protection
Input power: approx. 12V2A ≈ 20W (without fan power)
Output optical power: 5.5W
Line length: 300mm
Control line installation method: pluggable
Fan size: 30*10mm
Fan speed: 15000 rpm
Controllable temperature: less than 60 degrees Celsius
Focus range: 30-50mm
Best focal length: 40mm from the light exit
Safety Warning: Please apply this module under the premise of safety protection!
Recommended application machine: NEJE Master
Note: NEJE Master comes standard with 12V2A charger. If you want to upgrade your 
old machine, you need to prepare another 12V3A power supply.
packing list:
1 x module
2 x screw
2 x gasket
1 x control line


Module kits Troubleshooting process:

1. Disconnect the 12V power supply from the LaserTester
2. Disconnect the LaserTester and the laser module (4P cable)
3. Disconnect the 4P line from the laser module
4. Power on the LaserTester and press the SWITCH button to switch to the test mode
5. Connect 4P line and module first
6. Then connect the 4P line and LaserTester, pay attention to the status of the laser module fan when it is just connected

If it doesn't rotate, please check if the 4P wiring is correct (possibly bad wiring, bad socket contact)

If it turns, press the ℃ button on the control panel to see if there is a temperature display. If there is no display, please check the wiring (possibly bad wiring or poor contact in the socket)

If there is a temperature display (approximately equal to room temperature) and the fan rotates, there are 2 possibilities: 1. Poor wiring, poor contact of the socket, 2. The laser module is broken, and the module needs to be replaced

Q: How to work with GRBL?



Hold the control button for a larger view

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