Jumbo Easy-Read Car - Boat Compass - Suction Cup Be sure to 'always know your heading' with this quality jumbo compass Large 4"-height is easy to see, bright yellow & white markings easy to read with quick glance No wires to connect or batteries to change; durable polycarbonate with permanent liquid suspension Big 2-1/4" suction cup holds securely to windshield or dash, easy to remove without marks Mount at any angle - up/down/sideways - full tilt-swivel ball joint; great for cars, trucks, boats