FixtureDisplays Portable Temperature & Humidity Meter With Alarm 15599 15599 This portable temperature and humidity meter is an ideal design for you to measure temperature and humidity in the air. With alarm function, can remind you information as needed. The small stand make it easy to be place at any table top. It is also wall-mountable. Temperature / Humidity; C/ F temperature choices. Specifications: Overall Width x Height x Depth: 3.62" x 4.00" x 0.83". Economical way to monitor indoor or outdoor temperature and humidity. Measures temperatures as low as -58 degrees Fahrenheit and up to +158 degrees Fahrenheit. Display features one-inch tall digital numbers. Powered by 1 x AA battery (not included). Displays temperature, humidity and time simulatenouslyIf used outdoors, please place under protected area such as a covered porch. Instructions: 1. Celcius to Farenheit Swith: The switch is on the back side to the left of battery housing. 2. Set time: Press Mode will toggle between time and alarm settings. Press and hold Model will allow you to set time, or set alarm depending on what settings you are at. Use ADJUST button to set time. 3. Memory: Press Memory to toggle between min and max records. Press and hold 2 seconds to erase min max records.