Bracketron Universal Cup-iT Mount with Grip-iT Fits large cup holder sizes up to3.75" in diameter Transfers to multiple vehicles Grip-iT adjusts out to 4.5" wide Fits most portable electronic devices No tools required for installation Compatible with most MP3 players, all cellular phones, many GPS and satellite radios in today's mobile electronics market. Mounts to varying sizes of cupholders in your vehicle and keeps your mobile device secure. Adjustable wings open up to 4-1/2" and can accommodate many other mobile devices, such as cell phones and MP3 players. Easy-to-install design allows mount to be moved from vehicle to vehicle with ease.