Wavelength 808nm
Ouptut Power 180mW
Current <100mA
Power supply 5.0VDC
TTL modulation Voltage 0-5V 
TTL frequency 0-20KHz
Dimension: 18mmx45mm
The Lens focus is adjustable, not fixed, can adjust to an appropriate spot size, and then fix it.
Off low, high open, normal status close.If you only connect its black and red wire, the laser module would not be lighted and would not work
Three-wire input, the red line is positive, black line is negative,  TTL signal yellow line is positive

This 808nm laser module with driver built-in is an industrial electronic component and  used for Industrial testament, Lab.
The laser module is and precise and sensitive optical instrument. Before carrying on some laser DIY activities, please read about the technical information first and protect your eyes before laser ray. Be sure the operator has experience in optics DIY or testing.

Package 
1 x  808nm 180mw Infrared IR Laser Dot Module w/TTL 0-20KHz