GUIDE Clip-on is designed for both hunting and observation. For hunting, Clip-on is a thermal imaging attachment adding thermal imaging capability to your riflescope withoutlosing zero? or adjusting shooting position. With it, your riflescope can be used at both daytime and night, even in severe weather. Assembled with an eyepiece, Clip-on turns to be a thermal imaging monocular. This compact,lightweight and multifunctional device is a new choice for thermal imaging enthusiast.