Wacom STU-540 has most advanced and robust signature pad, 5-inch high-resolution color screen, hardened cover glass with anti-glare treatment provide enhanced viewing and a signing surface with a natural pen-on-paper feel, native support for citrix v7.6.3 and newer in standard USB mode, signature SDK are available for developer to integrate support for wacom signature pads into their application, customizable key pad enables input utilizing user-defined UI.