Brand new temp & humidity monitor. Item Type: Indoor Outdoor Thermometer Material: ABS Transmission Frequency: 433Mhz Indoor Temperature Range: -10℃ to 50℃ (14℉ to 122℉) Outdoor Temperature Range: -40℃ to 60℃ (-40℉ to 140℉) Humidity Range: 10% to 99% Temperature Resistance: +/-1℃ (+/-2℉) Humidity Tolerance: +/-5% Host Power Supply: 2 x AAA Batteries (Not Included) Sub Machine Power Supply: 2 x AA Batteries (Not Included) Host Size: Approx. 11x9x4.8cm/4.3x3.5x1.9in Weight: Approx. 173g/6.1oz