The WeatherTech CupFone Duo holds 1 or 2 phones in a fully adjustable position for both driver and front passenger. The WeatherTech CupFone Duo holds 1 or 2 phones in a fuFits mobile devices that measure between 2-3/8" wide to 3-3/8" wide and 9/16" deep.lly adjustable position for both driver and front passenger. CupFone Duo was designed using the same interchangeable base cups as CupFone, allowing you to custom fit it into your cup holder. 6 Billet knobs Included 100% designed, engineered and manufactured right here in USA! Comes with StickySleeve for a tight and secure fit in any cupholder The CupFone Duo has all the same features as our original, bestselling CupFone, plus an additional second phone holder, so both the driver and passenger can navigate, make phone calls and deliver hands-free voice commands while easily charging their phones. CupFone Duo was designed using the same interchangeable base cups as CupFone, allowing you to custom fit it into your cup holder. CupFone Duo features a storage console between the two CupFone heads, a convenient spot for storing pens, pencils, change and more. Fits mobile devices that measure between 2-3/8" wide to 3-3/8" wide and 9/16" deep. 100% designed, engineered and manufactured right here in America!