Function: -Memory function: max and min measured value memory, 12 hours/24 hours system display for selection. The temperature unit is switchable, selectable between and unit. - Large LCD display: LCD screen with large number shows the current percentage of indoor outdoor temperature and humidity, easy and clear to read. - Easy to install: with a retractable stand, simply put on the table. - Application: widely used in temperature and humidity meter, suitable for laboratory, cold chain transportation, warehouse and more. - Portable: alarm function, compact and lightweight, easy to carry. Details: Color: white, black Power supply: 4 AAA batteries required. Dimensions: Host: 16 * 3.3 * 12.5 cm Transmitter: 6.8 * 2.5 * 10.5 cm Temperature range: indoor 0 ~ 50 , outdoor -20 ~ 60 Humidity range: 20%~99% Packing list: 1*host1*transmitter