Easily Mounts to Dashboard - Mount AltiTilt to either the top OR front of your dashboard in your car or truck. Comes with two hook-and-loop attachments so you can easily mount in two different vehicles. Quickly detach the portable AltiTilt and take with you on the trail. A great accessory for long distance travel. Accurate Readings - Adjustable dial lets you account for high or low-pressure systems so that you get the most accurate reading possible. Perfect for off-road vehicles. Easy-to-Read Inclinometer - Brass ball instead of bubble included in bright Saturn yellow tube assembly. Engraved and hand painted numbers make for a functional, easy-to-read display. Easily visible from dashboard. Battery-Free - This analog altimeter is battery-free and simply adjusts based on the surrounding barometric pressure. Full Instructions Included - Easy step-by-step instructions help you learn how to set and adjust your Sun Company altimeters/barometers. Measure altitude, barometric pressure, and tilt angle all from your dashboard. Altimeter reads up to 15,000 ft (or 5,000 meters) and inclinometer reads tilt from -45° to 45°. Includes an extra set of hook-and-loop fasteners so that AltiTilt can easily be transferred between two vehicles. Altimeter detaches from housing for easy pocket portability. A must-have accessory for all off-road vehicles! Mounts on top or front of dashboard with adjustable bracket. Housing should be oriented vertically for tilt-angle accuracy. The perfect addition to your travel and off-roading plans!