Frequency: <15khz, PWM : 0-5V , 850nm (+-10nm), adjust PWM duty cycle can adjust its power! Red Wire connects with 12V+ , Black wire connects with 12V-, Yellow Wire connects with PWM +, White Wire Connects with PWM -. PWM is not necessary , you can connect 12V power sources to 12V+ and GND to turn it on. | Please press the button on the driver board to turn on , and this is NOT for engraving or cutting! | This IR module has rectangular spot , not a round one, and when it is foused , it is not a round dot , its a narrow line! | This is IR light, human eyes can not see it clearly, you can use phone camera to see the dot. So please NEVER look into the aperture directly when it is plugged in!! | Packing ：IR module*1 , 12V 2A AC/DC adapter *1, cables* 3