Digital themometer product features ●temperature measurement:-50°c~+300°c (-58°f ~+572°f) ●temperature accuracy: ±1°c/°f ●power-saving mode : 10minutes auto power off function ●power supply: 1.5v(ag13)x 1key button function ●on/off keys: switching ●°c/°fkey: the display mode,this button can be °c/°f conversion function. ●hold key: temperature conditions in the display, press the lcd display can be maintained at hold state, then a measurement of the recovery temper ature to detect when running hold function, lcd display hold meet. ●max/min key to view the maximum/minimum.