Small size:compact,occupy less space. Convenient data connection and data save:connect to PC via USB cable, and the data could be saved in the form of of curved graph,Excel or word. Big record capacity:record up to 16000 points Power supply:internal battery LCD display:Data could be display in LCD screen It is wildly used to monitor the temperature in all kinds of middle and low temperature cold storage,medicine and foodstuff industry. It could record the temperature variation,and by connection to PC via USB cable,data could be read or saved ini the form of curved graph,Excel or Word. Max./Min.value could also be checked.     Power supply:one inner lithium battery,screw off the back cap to replace the battery Dimension:length 84mm width*44mm hight*20mm Ambient temperature range:-30C~+60C; Storage temperature range:-40C~+70C; Accuracy:+1C; Resolution:0.1C; Record capacity:16000points(MAX); Record interval:10s~24hour adjustables; Sensor:internal two-wire NTC temperature sensor; Communication interface:USB interface; Power supply:Inner 3V CR2450 battery or power supplier via USB interface; Battery life :in normal temperature 25C,if the record interval sets as 15 minutes, it could be used above one year.