It does fit in the proclip adjustable, I have had several treos in the past, 600,650,700p, and now a 755p by using the adjustable mount I could leave my treos in a skin case. The only drawback is you have to manually plug in the phone and then squeeze the mount to hold it. The one made for the treo would just slide in, and would be connected, it has a cigarette lighter charger cord already on it.