1,good quality 2,preferential price 3,package:double blister card Temperature range:0 to 400°F(-20 to 200°C)Accuracy:30 to 400°F(-1 to 200°C):±2.5% of reading or ± 4°F(±2.5°C)whichever is greaterBelow 30°F(-1°C):±7°F(±4°C)Response time:0.5 secondOperating environment:32 to 120°F(0 to 50°C) at a relative humidity of 10-95%Power:6F22 9V Alkaline batteryDistance to Spot Size(D:S):5:1Emissivity:0. ...