High quality and durable and reusable. Looks fashion and compact. Designed to deliver extensive, accurate and vital information with altimeter, barometer, thermometer, compass, weather forecast and time display. Time with hour, minute, second, 24 hours format clock display. Compress: 4-bearing mode display and magnetic declination setting. Next 12 to 24 hours weather forecast. All functions are displayed on LCD screen with super bright LED backlight. You can wear it on your wrist when traveling at outside. Can put it on mobile holder when driving in a car. Can also fix on a bicycle. Uses CR2032 lithium cell. Ideal for outdoor activities.