Specifications: 1) Temperature range: -50~70oC 2) Humidity: 20-99% 3) Differentiate: 0.1oC 4) Power: #7 alkaline battery (optional) 5) Size: 115 x 64 x 19mm 6) LCD size: 63 x 43mm Inner packing: Blister packing Outer packing: 630pcs/ctn Carton dimensions: 56 x 39 x 36cm