FUNCTION FEATURES Double probe can measure the temperature, two side temperature switch between C/F. project technical parameters: measuring range:-50ºC--- +70ºC(-58ºF--- +158ºF) resolution: >-20ºC is 0.1ºC;≤-20ºC is 1ºC Accuracy:±1ºC(±2ºF) Power supply: DC1.5V 7#(Alkaline batteries) Screen size: 33*12mm