Metal shell crafted from aluminum and zinc Hassle-free battery replacement with easy slide-out design, no tools required Extended battery life with up to 1-year standby time Powered by a button cell, eliminating battery faults and capacity loss EV compensation feature for handling challenging lighting conditions **does not include camera lens Specification:Material: zinc, aluminum, & PC plasticColor: Black or SilverMetering Angle: 30-degree average meteringCensor type: silicon photodiodeShoe bracket position: left, center, or right (adjustable)Dimensions: 35mm x 28mm x 11.5mm (1.4inch x 1.1inch x 0.45inch)Weight: 25g (0.88oz)Working Temperature: -12°C-60°CBattery: CR1632 x1 (NOT INCLUDED)ISO Range: 8-6400Shutter Range: 30s-1/8000sAperture Range: 1-32Exposure Compensation: -2 -- +21-Year WarrantyRead user manualWhat you will receive:1. Meter2. Shoe bracket3. Spare battery holder4. Screws and a screw driver