With the handheld transmitter to sensor outdoor temperature and transmit within 100m unobstructed. 12H/24H format, temperature unit /unit for selection. Can be placed on the table or hung on the wall. Adopt wireless technology, you can know the outdoor temperature in the indoor receiver. Record the max indoor and outdoor temperature . Display indoor/outdoor temperature and time at the same time. Product Description Features: Material: ABS Black color Display: 94*54mm LCD screen Indoor temperature measurement range: 0~50 / 32~122 Outdoor temperature range: -20~70 / -4~158 Temperature accuracy: 1 Indoor temperature detection period: one time test 30 seconds Outdoor temperature detection period: one time test 57 seconds Function: time display, indoor / outdoor temperature, / Switchable, format 12H / 24H time clock, separate transmitter Transmitter battery: 2 * 1.5V AA batteries (not included) Temperature clock Power supply: 2 * 1.5V AAA Batteries ( not included) Transmitter size: 130 * 40 * 22mm / 5.12 * 1.57 * 0.87in Hygrometer Clock size: 150 * 86 * 23mm / 5.91 * 3.38 * 0.91 in This LCD digital temperature clock which can display indoor and outdoor temperature and time simultaneously, is ideal for home use. It is suitable for layout or wall hanging. Large LCD display, you can easily read the value. Accurate measurement for measuring indoor and outdoor temperature. Package List: 1 * Temperature Clock 1 * User Manual