Multifunctional meters made of ABS, which is durable and long-term to use The height measurement range of the electronic altimeter is 700 to 9000m \/ -2300 to 29500ft (the altimeter can be used for initial calibration), the resolution is 1 meter or 3 feet The digital altimeter can predict weather conditions after 12-24 hours. The weather indicates: a 2 AAA battery, 2 Sunny-Cloudy-rainfallring (not included) The size of the electronic altimeter is 90x50x20mm, which is convenient for you to carry with you when you go out stress-free This is a multi-function meter that helps you measure altitude, temperature, air pressure and compass Description Preventive measures: Avoid using rain, humidity, high or low temperature, (working temperature: 0 -50; storage temperature: -20 -70. Avoid contact with perfume, alcohol, detergent and other corrosive substances. Avoid close to buildings such as concrete\/steel or place it on the surface of metal plates. Features Digital Altimeter - Color: as shown. -Material: ABS. -Size: 9x5x2 cm \/ 3.54x1.97x0.79 inch. Measurement range 300mbar to 1100 mbar (resolution 0.1mbar) The measurement range -10C to +60C (The C and F units are optional). Resolution: 0.1 degree Package including 1 * Digital Altimeter (no battery)