Item Type: Digital CompassMaterial: ABSAltimeter Range: -2296 ft to 29500 ftAltimeter Resolution: 1 Meter or 3 FeetBarometer Range: 350-1100 hpaBarometer Resolution: 1 hpaCompass Accuracy: +/-3 DegreesCompass Resolution: 1 DegreeThermometer Range: -5-+50Thermometer Accuracy: 2Thermometer Resolution: 1Weather Forecast: (Sunny, Cloudy, Rainy)Battery Type: 2 x AAA Batteries (Not Included)Package List1 x Digital Compass1 x Lanyard1 x Manual18 in 1 Functions: Contains digital altimeter, digital barometer, digital compass, weather forecast, time, calendar, thermometer and backlight. 2Altimeter and Compass: Altimeter range: -2296 to 29500 feet, can record 256 historical altitudes; compass shows bearing in degrees and cardinal points. 3Thermometer and Clock: Thermometer is freely switchable in Celsius, Fahrenheit format; Clock in 12hour or 24hour format. Backlight is provided for you whenever you press any button. 4High Accuracy: The digital compass is based on electronic orientation sensor and air pressure sensor technology for precise measurement. 5Outdoor Use: The digital altimeter is designed for outdoor use, and the detachable lanyard makes the digital compass the perfect handheld device for all kinds of outdoor activities.