The top-selling PDA accessory in the world, WriteRights are clear overlays that fit directly over the screen of your handheld device. Once installed, WriteRights protect the fragile screen from scratches. In addition, they reduce glare and improve handwriting recognition by simulating the feel of writing on real paper. Each WriteRight lasts approximately one month and the package contains a full year supply of 12 WriteRights.This product is designed for Handspring Treo 90, 270, 300.