1x 532nm 200mW Laser Dot Diode Module. Power:<200mW. Power can be adjusted by external PWM signal! PWM frequency not more than 18kHz, duty cycle to adjust the power. Laser interface has three pins, the red line connected to the 12V + power, yellow line connected to the PWM + signal, black line connected to the power GND, white line connected to the signal GND, power and signal common ground!
eBay