Good for the price - Stealth Cam Digital Night Vision Monocular w/ IR Filter

Works great, the first reviewer wrote about not being able to see through glass. Tbis is obvious because 1) the amount of energy in IR is significantly lower than visible light. 2) the wattage on the light is 1 watt, now if it was say a 50 watt bulb then maybe you could see through then. It does the job and can obviously pick up 435-850nm wavelengths of light.