Sun Company AltiPort - Detachable Windshield and Dashboard Altimeter and Barometer | Altimeter for Cars and Trucks | Reads Altitude from 0 to 15

EASILY MOUNTS TO DASHBOARD OR WINDSHIELD - AltiPort quickly mounts using levered suction cup and sticky pad. Easily remove altimeter from mount and take with you in your pocket or pack on the trail. Perfect for your car or truck dash.
ACCURATE READINGS - Adjustable dial lets you account for high or low pressure systems so that you get the most accurate reading possible.
BATTERY-FREE - This analog altimeter is battery-free and simply adjusts based on the surrounding barometric pressure.
EASY-TO-READ SCALE - Easily measure altitude up to 15,000 feet. Barometric pressure is measured in inches of Mercury (Hg).
FULL INSTRUCTIONS INCLUDED - Easy step-by-step instructions help you learn how to set and adjust your SUN altimeter.