Listing is for a single 2W 445nm LD module. Unit is upgraded with a highly thermally conductive copper module for max cooling and stability. It is prewired with a 1.8A X-Drvie bucking LD driver and comes with a high pass single element 405-G-2 glass lens. The unit is ready to be dropped into your final project. No setting current or soldering diode to driver. Just place in heatsink and connect leads to your power supply. Input voltage range is 6V-8.4V. Great for use with two Li-Ion's or Lipo's. Suggest two 16340/18350/18650 3.7V Li-Ion's or 3.2V Lipo's. You can also use a 6-8V 2A wall adapter or bench power supply. The X-Drive is encased in the back of the model connected to the diode. Modules are wired with extremely flexible 26AWG wire that is burn proof and makes for very easy soldering. Wire assignment is: Red + Black - Module 12mm(11.96mm)x30mm Wavelength 445nm +/- 5nm Input Voltage 6V-8.4V Driver Output Current 1800mA Driver Current Draw 1.4A +/- 0.5A Power Output 1.9W-2.2W Driver Type Constant Current Lens M9x0.5mm Threaded 405-G-2 Reverse Polarity Protection Yes Duty Cycle 90 seconds on 30 seconds off with proper heatsinking