Condition: 100% New Item Type: Temperature Humidity Meter Material: ABS Temperature Range: -30-+60, for optional external sensor: -40-+85 Temperature Accuracy: 5 (-20-+40), 1 (others) Temperature Unit: or F optional, set by THC-4 data management software Humidity Measurement Range: 0-99% RH Humidity Accuracy: 3% RH (25, 20-90% RH), 5%RH (others) Resolution: Temperature: 0.1; Humidity: 0.1% RH Record Capacity: 16000 Groups (maximum) Record Interval: 10s-24 hours adjustable Communication Interface: USB Interface Power Supply: 1 x 3V CR2450 Battery (not included) or power supply via USB port Environment Temperature: -30-+ 60. (Under low temperature environment, LCD display is slow and has no effect on normal measurement or recording. When the temperature is restored, it will display normally.) Size: Approx. 90 x 46.4 x 16.4mm / 3.5 x 1.8 x 0.6in Weight: Approx. 98g / 3.5oz