It is a lightweight and multifunctional device for outdoor use The backlit digital display is designed for easy reading of data Thermometer: in degrees Celsius / degree Fahrenheit; Clock: in 12 hour or 24 hour format 8 in 1 function: digital altimeter, with digital barometer, digital compass, weather forecast, time, calendar, thermometer Altimeter: -700 at 9000m / -2300 to 29500ft. Weather forecast. History Altitude record: 256pcs records, compass: exposure in degrees and cardinal point Feature: The device is based on electronic bearing sensor and sensor technology barometric 8 in 1 Function: Digital Altimeter, with digital barometer, digital compass, weather forecast, time, calendar, thermometer and backlight The digital altimeter is designed for use in exterior, the detachable string makes the digital compass perfect for carrying by hand. Device for various outdoor activations. It will give you backlight when you press any button at any time. Specifications: Calendar Backlight p> Weather forecast Item weight: 70g Waist size: 90 x 50 x 18 mm History Record altitude: 256pcs records Altimeter: -700 ~ 9000m / -2300 ~ 29500ft Compass: show bearing in degrees and cardinal point Thermometer: In C / F format Clock: In 12 hour or 24 hour format Battery: by 2 AAA batteries (not included) Package contents: 1 x 8 in 1 Digital Altimeter 1 x Rope