This indoor/outdoor thermometer brings much convenience for your daily life. Just put the receiver on the desktop, you can know outdoor temperature easily. Features: Can display indoor and outdoor temperature. Transmission function Wireless, 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: indoor temperature measurement: 0 ~60C outdoor temperature measurement: 40 ~60C accuracy: (+/)1C Wireless Transmission(in open air)): 100 meters, 30 meters under most conditions frequency: 433 MHz update rate: 60 seconds Transmitter Battery: 2 * 1.5V AAA Batteries(not included) Receiver 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 / 1.01oz receiver weight: 38g / 1.37oz Package List: 1 * Receiver 1 * Transmitter