EQUIPMENT TYPEDPMCONFORMS ISO 8502-4, BS7079-B and ASTM D3276SURFACE TEMPERATURE RANGE-40° to 80℃SURFACE TEMPERATURE ACCURACY±0.5℃AIR TEMPERATURE RANGE-40° to 80℃AIR TEMPERATURE ACCURACY±0.5℃HUMIDITY RANGE0 to 100%OPERATING RANGE-40℃ to +80℃DIMENSIONS178 x 64 x 31mm (7” x 2.5” x 1.2”) 185g (6.5 oz) without batteriesBATTERY LIFE100 hous continuous; 80 hous Auto Log