The AGM Rattler TC50-640 is a compact thermal imaging clip-on system that allows quick transformation of the day optics into thermal imaging device without any special tools or equipment. - The Rattler clip-on is a perfect addition to any hunter's arsenal. Equipped with a 50mm germanium lens and a 640x512 resolution high-sensitivity thermal sensor this unit has a detection range of 2500 yards. Rattler TC provides a clear image under harsh environmental conditions like darkness fog smoke dust rain snow wood camouflage etc. The product is mainly applied to scenarios such as patrolling hunting overwatch etc. The Rattler TC can easily be attached in front of day scopes with magnification up to 8x for medium and long range use. - This unit also comes packed with all the features that many Rattler users have come to expect which include: built-in recording and picture capture capabilities Wi-Fi hotspot AGM Connect app compatibility for storing and sharing images and videos 16 GB on-board storage 4.5 hours of battery life on two CR123 batteries external power capability through the unit