This indoor/outdoor thermometer brings a lot of comfort to your daily life. Just put the receiver on the desk, you can know outdoor temperature easily. Features: Can display indoor and outdoor temperature. Transmission function Wirelessly, you can know the outdoor temperature with indoor receiver. Indoor temperature range: 0 ~ 60C; outdoor temperature range: -40 ~ 60C. Very convenient, great item use for home or office. Specifications: Temperature measurement interior: 0 ~60 C outside temperature measurement: -40 ~60C accuracy: (+/-)1 C Wireless Transmission(in open air)): 100 meters, 30 meters under most condition frequency: 433 MHz update rate: 60 seconds transmitter battery: 2 * 1.5V AAA Batteries(not included) Receiving battery: 2 * 1.5V AAA Batteries(not included) transmitter dimensions: 6.6 * 5 * 2 cm / 2.6 * 1.97 * 0.8 in receiver size: 8*5. 5 * 1.7 cm / 3.15 * 2.16 * 0.67 in Transmitter weight: 28g/1.01 oz receiver weight: 38g/1.37 oz Package List: 1 * receiver 1 * transmitter