Yes it can be used in day light as well without damaging the unit as it is a digital night vision and not tube powered.
All night vision requires some sort of battery to power the unit. There are no night vision units that do not use batteries in some way.
Yes, it can be mounted to a picatinny rail.
Extreme temperatures and temperature changes can affect the optics and zero of this optic. You need to verify its zeroed for whatever climate you will actually be shooting in.
The product includes a removable IR illuminator, no additional purchase is needed.
Mark H.
This optic requires the use of a picatinny rail, and is not compatible with weaver-style bases.
Mark H,
This might not hold up well over time on a shotgun, these are only rated up to .308.
Yes, since this is a digital device, it should hold up on a crossbow.
It is made using the proprietary CORE (Ceramic Optical Ruggedized Engine) image tube, which includes double the resolution of Gen 1 devices. It is brand new.
If you're asking how far you can see, it depends on the conditions. With appropriate IR light, you can see past 300 yards. However, the magnification limits you to around 300 yards for effectiveness if hunting/shooting.