Got this for my Treo 650, and the static was horrible on it. It basically worked as long as there was a direct line of sight to the handset. Meaning that if I swung my arm between the Treo and the headset, I would get momentary static.The Treo 650 is very touchy with the bluetooth devices it works with, and only the Palm headset and the Sony headsets have consistent success with them.This headset would probably have been fine on another phone, but on my Treo, is was terrible. Hate to give it a 1 since it probably works fine, but I gots to call 'em like I see 'em.