Weather Combo Pack: WT-137U and WS-9215U-IT. WT-137U -Monitors IN temp. ( F/ C) & humidity (%RH) -Records MIN / MAX humidity & temperature-5 Level humidity bar from dry to wet:-Low battery indicator-WS-9215U-IT -Weather forecasting function w/3 weather icons and weather tendency indicator-IN/OUT temperature with -MIN/MAX records ( F/ C)-12/24 Hour time display-Low battery indicators-Wall hanging or free standing Dimensions -WT-137U Receiver: 3.44" L x 0.63" W x 3.44"H-WS-9215U-IT Receiver: 3.27" L x 0.98" W x 6.18" H-WS-9215U-IT Sensor: 1.27" L x 0.55" W x 3.4" H