... ,T,N,B,R,S thermocouples, Dual display, Record function. DM6803A+ 4 1/2 Dual display intelligent digital thermomterFeatures:1.Temperature measuring ... set cold temperature automatic saving;4.°C and °F display;5.Dual display: display max .min and relative mV value of input ... indicationApprox. less than 7.5V Data hold√Unit symbol display√Function protect√Anti-shock protect√Sampling rate3 times/sOperation ...