This LCD digital temperature clock which can display indoor/outdoor temperature and time simultaneously, is great for home use. It is suitable for desktop placing or wall hanging. Large LCD display, you can easily read the value. Accurate measurement for measuring indoor & outdoor temperature. Features: Display indoor/outdoor temperature and time at the same time. Adopt wirele technology,you can know outdoor temperature in indoor receiver. Record max/min indoor and outdoor temperature. 12H/24H time format, / temperature unit for selection. Can be placed on the table or hung on the wall. With portable transmitter to sensor outdoor temperature and transmit within 100m without obstacle. Powered by 2 1.5V AAA batteries(Not included). Specifications: Material: ABS Color: Black Display: 94 * 54mm LCD Display Indoor Temperature Measuring Range: 0~50 / 32~122 Outdoor Temperature Range: -20~70 / -4~158 Temperature Accuracy: 1 Indoor Temperature Detection Period: testing once 30 seconds Outdoor Temperature Detection Period: testing once 57 seconds Function: Time Display, Indoor/Outdoor Temperature, / Switchable, 12H/24H time format, Separated Transmitter Battery of Transmitter: 2 * 1.5V AA Batteries(Not Included) Temperature Clock Power Supply: 2 * 1.5V AAA Batteries(Not Included) Size of Transmitter: 130 * 40 * 22mm / 5.12 * 1.57 * 0.87in Hygrometer Clock Size: 150 * 86 * 23mm / 5.91 * 3.38 * 0.91in Transmitter Weight: 47g / 1.64oz Temperature Clock Weight: 122g / 4.30oz Package Size: 16 * 14 * 3cm / 6.30 * 5.51 * 1.18in Package Weight: 259g / 9.12oz Package List: 1 * Temperature Clock 1 * Transmitter 1 * User Manual