This 12v module has a driver with TTL Modulation to allow switching at up to 20kHz. Coated glass optics.
9mm Nichia diode
Optical Power: 4800mW
Operating Voltage: 12.0V
Operating Current: 2A
Operating Lifetime: >1000hrs
Operating temperature: 10 - 40 °C
TTL Control: 20kHz @5V
Glass lens (OFL3-M)
This module has adjustable focus and optional TTL switching that can be used to control the power output (normally on full power, the TTL signal can be used to reduce the output power using PWM). 12V operation. Cooling fan. Suitable for CNC laser engraving etc. 4W+ will cut paper, thin balsa wood etc. and engrave wood. Standard 9 x 0.5mm thread lens allows alternate lenses to be used. Laser head has mounting holes pre-tapped.
Received the laser module from DTR, fortunately without any customs problems
Now I have to wait until my safety glasses arrive. Won't try it before... ;-)