Tasco NV-360 Night Vision Monocular Spotting Scope Features. Automatic brightness control. Built-in IR illuminator. Total darkness technology. Rugged and versatile design. Water and dust resistant. Superb 3X lens system. 90 mm; F1:1.7. 1.5m to? 3V Lithium CR123A Battery. 200 x 60 x 60 mm (8″ x 2.5″ x 2.5). 0.6kg (1.3 lbs).