HR 10310601 Self-adhesive Automobile Dashboard Compass - 2.1 x 2.2 x 2.3 Inches Always Drive, Bike or Walk in the Right Direction Thanks to This Small and Compact Compass IMPORTANT! Shipping as registered Letter usually takes 7-10 Days! This is a magnetic compass and this can be affected by anything magnetic near it - and there are many of those on a car. Free floating compass ball guarantees orientation everywhere Quick and easy installation with adhesive mounting