Monitors indoor and outdoor temperature. See the temperature across the room with large jumbo LCD display. Recall of maximum/minimum readings within last 24 hours. Detailed Specifictaions - EM899 Indoor/Outdoor thermometer Min/max temperature memory with rest button External temperature with 3 m probe Free-standing or wall mountedTemperature range inside: 0?C to +50?C Temperature range outside:-50?C to +70?C Selectable ?C or ?F Free-standing or wall mounted Battery : 1 x AAA 1.5V included Size: 98(h) x 106(h) x 20(t)mm Weight: 176 g Detailed Specifications - EMR899 Large multi-channel in/outdoor temperature display Displays indoor and 1 up to 3 radio based temperature sensors up to 30 m distant Temperature range: -5?C to +50?C Sensor THR128 displays temp Min/max temperature memory Hi/Lo temperature alarm for each channel Temperature and humidity trend indicator User selectable ?C/?F Table stand/Wall mount Battery included: 2 x AA size 1.5V Size 117(h)x107(w)x26(t) mm Weight: 179 g Remote Sensor Remote sensing range: -20?C to +60?C Splash proof with LCD display of temperature Transmitting every 30 seconds Size: 91x59x20 mm Weight: 85 g Detailed Specifications - EMR812HGN Large multi-channel in/outdoor temperature and humidity display Displays indoor and 1 up to 3 radio based temperature/humidity sensors up to 30 m distant Temperature range: -5?C to +50?C Humidity range: 25% to 95% Sensor THGR228N displays temp/humidity Min/max temperature and humidity memory Hi/Lo temperature and humidity alarm for channel 1 Temperature and humidity trend indicator User selectable ?C/?F Table stand/Wall mount Battery included: 2 x AA size 1.5V Size 117(h)x107(w)x26(t) mm Weight: 179 g Remote Sensor Remote sensing range: -20?C to +60?C Splash proof with LCD display of temperature and humidity Transmitting every 30 seconds Size: 91x59x20 mm Weight: 85 g