Features: Two probes measuring two-way temperature (internal and external), switch between ℃ and ℉, clock function, attractive appearance. Specifications: Power supply: Powered by AAA battery (not included) Temperature Measuring range: -50℃ – 70℃ (-58℉-158℉) Resolution: 0.1℃(>-20℃),1℃(＜-20℃) Accuracy : ±1℃ External sensor length: 1.5m Products size: 118x30x28.5/mm