Usage Tips:Multifunctional digital altimeter is based on the technology of electronic bearing sensor and air pressure sensor. It's designed for outdoor use; the detachable lanyard makes the altitude meter a perfect hand-carry or neck-carry device for various outdoor activities like climbing, hiking, fishing, camping and so on.Features:8-in 1 LCD multifunction digital altimeter, with digital barometer, digital compass, thermometer, weather forecast, clock, calendar.LCD display with backlight, easy to read even in dark environments. The digital altimeter can save 256 pcs history altitude and air pressure record for viewing.Powered by a 3V CR2032 button battery; press and hold the 'SET' button for 5s to enter dormancy mode to save battery.Pocket size and light weight, comes with a lanyard, portable and easy to carry.Premium quality material, with great durability. Perfect for outdoor use, such climbing, fishing, hiking, camping, etc.Note: Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding.Specifications:Color: Black & YellowMaterial: ABSScreen: LCD with BacklightAltimeter: -2296~29500ft Range, 3ft ResolutionBarometer: 350-1100hPa Range, 1hPa ResolutionCompass: 3 degrees Accuracy, 1 degree resolutionThermometer: -5~50 (23-122) Range, 2 Accuracy, 1 ResolutionTemperature Unit: / SelectableWeather Forecast: Next 12 to 24 hours (Sunny, Slightly Sunny, Cloudy, Rain)Time Format: 12H/ 24HTime: hour, minute, secondCalendar: month, data, yearPower Supply: 1 * 3V CR2032 Button BatteryItem Size: 93 * 54 * 15mm / 3.66 * 2.13 * 0.59inItem Weight: 47g / 1.64ozPackage Size: 13.8 * 6.5 * 3cm / 5.43 * 2.56 * 1.18inPackage Weight: 80g / 2.81ozPackage List:1 * Altimeter1 * Lanyard1 * User Manual (English)