MOUNTS GARMINŽ N;VIŽ IN CAR'S CUP HOLDER OPENING ; FITS INTO MOST STANDARD CUP HOLDER OPENINGS FROM 2.5" TO 3.25"; ADJUSTABLE FLYWHEEL BASE; INSTALLS EASILY WITHOUT TOOLS; EASILY TRANSFERRED FROM VEHICLE TO VEHICLE; COMPATIBLE WITH ALL GARMINŽ N;VIŽ & STREETPILOTŽ C310, C510, C530, C550 & C580 PORTABLE NAVIGATION DEVICES; SNAP-ON POWER CONNECTOR NOT INCLUDED