digital car compasses : . Deluxe Digital Compass interface,Sleek metallic- finish design . Resolution: 1 deg . High accuracy: 2 deg . Power: 3VDC or 12VDC . Full-featured digital compass system for all vehicles with Clock, thermometer, (altimeter, barometer, and weather forecaster available ). . With hard iron calibration and magnetic declination calibration . Self-correcting: hold the compass in your hand while turning in two circles . Adjustable auto shut-Off: adjustable time compass shut-off to conserve battery life . Bright "auto on/off" backlight Contach person: Mr. Cui TEL: 086-0755-83975382-828 13798493927 FAX: 086-0755-83975309