The UTAC-16c Series thermal imager from Nivisys features the latest in VOx detector technology and performance. This clip-on weapon sight is meant to be used in conjunction with a user's standard day sight. It works best with magnifications up to 4X. It attaches to any Picatinny rail and features Nivisys' patent-pending Accu-Zoom for a one-time alignment between the day scope and the thermal device. Remote switch capability as well as simple and easy-to-use controls make targeting simple, fast, and accurate.