HAND HELD ALTIMETER This rugged altimeter displays the altitude, barometric/sea level pressure, compass and current temperature readings. Features a flashlight and EL backlight function for easy viewing in low light conditions, a 12-24 hour clock with alarm function and calendar, is water resistant (up to 164 feet/50 meters), and is shock resistant up to 3 feet/1 meter). Altitude range: -1312 to +29,520 feet (-400 to +9,000 meters).