Usage Tips: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 wireless technologyyou 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: 050 / 32122. Outdoor Temperature Range: -2070 / -4158. 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.