VOC Meter Display Screen Type LCD Communication Protocol PC-Compatible Interface USB Battery Size AAA Operating Temperature - Maximum 122 Degrees F Manufacturer Warranty Length 2 yr Operating Voltage 110V AC Overall Width 2.4 in Sensor Life 5 yr Operating Humidity - Maximum 95 Percent Operating Humidity - Minimum 0 Percent Sensor Type Metal Oxide Accuracy +/-1.2 Degrees F/0.1 Degrees Alarm Setting Adjustable Display Size 2 in