Velcro attaches it to the back of a Pocket PC.

XYZworks offers a pole mount specially made for Pocket PCs for Robotic and GPS users. The Surveyors Pole Mount can be used with any PDA or Pocket PC. It uses Velcro to attach directly to the back of your Pocket PC or to any of XYZworks’ Window Cases and adjusts to any angle or height for easy screen viewing.