This indoor/outdoor thermometer brings convenience to your daily life. Just put the receiver on the table, you can easily know the outdoor temperature. feature: Can display indoor and outdoor temperature. With the wireless transmission function, you can know the outdoor temperature through the indoor receiver. Indoor temperature range: 0~60C; outdoor temperature range: -40~60C. Very convenient for home or office use. Product specifications: Indoor temperature measurement: 0~60C Outdoor temperature measurement: -40~60C Accuracy: (+/-) 1C Wireless transmission (outdoor): 100 meters, 30 meters in most conditions Frequency: 433 MHz Update rate: 60 seconds Transmitter battery: 2 x 1.5V AAA batteries (not included) Receiver battery: 2 x 1.5V AAA batteries (not included) Transmitter size: 6.6 x 5 x 2 cm. Receiver size: 8*5.5*1.7cm Transmitter weight: 28 grams Receiver weight: 38g Package size: 17*7.7*3cm Package weight: 109g Package List: 1 * Receiver 1 * Transmitter 1 * Manual 'use (English) Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be some difference of color, depending on the physical object received Delivery quantity: (according to the main image)