Durable metal shell made of sturdy aluminum and zinc construction. Hassle-free battery replacement with easy slide-out design. Long-lasting battery life of up to 1 year on standby. Powered by a convenient button cell, say goodbye to battery issues and capacity loss. Enhanced EV compensation for handling extreme lighting conditions. Made of zinc, aluminum, and PC plastic in your choice of black or silver. Equipped with a 30-degree average metering angle and silicon photodiode censor for accurate readings. Adjustable shoe bracket position on the left, center, or right. Compact dimensions of 35mm x 28mm x 11.5mm (1.4inch x 1.1inch x 0.45inch) and lightweight at 25g (0.88oz). Suitable for use in temperatures ranging from -12°C to 60°C. Powered by one CR1632 battery (NOT INCLUDED) and compatible with ISO range 8-6400, shutter range 30s