Light, compact thermal imager. Weight: approx 1 lb. Dimensions: 3 x 3 x 3 in. General temperature index (GTI) shows digital readout of object temperature in °F or °C readout (above 480°F or 249°C). Uses industrial grade AA batteries. Can be used on a faceshield equipped helmet. Very high performance, self-adjusting Electronic Iris (EI). Field replaceable, low cost lens and eyepiece cover.