This digital clock can detect indoor temperature&humidity as well as three outdoor areas within 100 meters. It is a multifunctional clock that supports display of time and calendar, alarm clock and snooze function, and can also work as a meteorological station that shows weather forecast and measures air preure. Features: Multifunctional clock - it's more than just a clock. It can also detect temperature and humidity both indoor and outdoor, and display calendar, weather forecast and air preure. RF function - it comes with 3 transmitters that allow it to detect 3 groups of outdoor temperature and humidity data within 100-meter distance. Alarm clock and snooze - supports alarm clock setting and snooze function with the snooze time programmable from 5 to 120 mins, practical and useful. Large backlit display - equipped with high-definition color display with backlight with the brightne adjustable among three levels. Alarm limit for temperature & humidity - supports upper and lower alarm limits setting for temperature & humidity, and when the data out of that limit, the alarm sign will flash and it beeps five times per minute. Specifications: Material: ABS Color: Black Power supply(Clock): 3*AAA batteries(Not included)/ AC 5V Power supply(Emitter): 2*AA batteries(Not included) Function: Time / Calendar / Temperature / Humidity / Alarm / Snooze / Backlight / RF / Air preure / Weather forecast Indoor temperature range: -10~50(14~122) Outdoor temperature range: -40~70(-40~158) Air preure range: 23.62InHg~32.48InHg(800hPa~1100hPa) Humidity range: 10%~99% Item Size: 135*24*210mm / 5.31*0.94*8.26in Item Weight: 336g / 11.85oz Package Weight: 634g / 22.36oz Package Size: 22 * 8 * 14.5cm / 8.66 * 3.14 * 5.7in Packing List: 1 * Clock 3 * Emitters 1 * USB cord 1 * User Manual (English)