STU-540 / STU-541


STU-540 / STU-541

The STU-540 / STU-541 are the premier models of Wacom’s signature pad (STU) series, featuring a 5″ high-quality, high-resolution color LCD screen with a special hardened durable cover glass for a natural, paper-like feel. The encryption for both models offer the highest level of trust for security-conscious industries and organizations. They also support virtualized desktop environments.

STU-540 and STU-541 features and benefits

  • Patented cordless, battery-free pen with 1024 levels of pressure sensitivity to accurately capture the unique signature including biometric data
  • Hardened cover glass with anti-glare treatment provides a signing surface with a natural-paper-like feel
  • The most secure TLS (Transfer Layer Security) encryption -on STU-541- and state-of-the-art AES 256/ RSA2048 encryption -on STU-540- to perform secure transactions
  • Virtual COM Port (VCP) mode is supported for compatibility with Citrix XenDesktop and XenApp v6.5 and later. (STU-540 only)
  • Key pad and PIN pad are customizable to enable input using graphic images or numerics
  • WILL (Wacom Ink Layer Language) rendering to show the best and most authentic representation of your handwritten digital signature
  • UID (Unique hardware ID) is included to identify the exact unit used for a particular signature and other inputs.
  • STU SDK (Software Development Kit) and Signature SDK are available for developers who wish to integrate support for Wacom signature pads into their applications.
  • Upgraded USB protocol and internal image storage enable promotional materials to be shown at natural speeds with no delays.


STU-540 Images
STU-540 / STU-541 Factsheet
STU-541 cryptograpy white paper

Technical specifications

General specifications

Communication interface STU-540: USB 2.0/RS-232, STU-541: USB 2.0
Overall dimensions 163 x 157 x 10 mm (6.41 x 6.18 x 0.39 inch)
Power supply USB bus powered
Display type Amorphous TFT LCD
Screen size 5'' (108 x 65 mm)
Native resolution 800 x 480 pixels
Reading technology Electromagnetic Resonance (EMR)
Pen pressure levels 1024 (non-interpolated)
Pen report rate 200 points per second (non-interpolated)
Coordinate resolution 2,540 lpi / 0.01 mm/pt(non-interpolated)
Coordinate accuracy ± 0.5mm (center)
Security lock slot Yes
Battery-free pen Yes
Cordless pen Yes