The Signotec Sigma is the smallest signature pad with an approx. 4" (10.4 cm) monochrome display (LCD), which is optionally available with or without backlight. The RTP sensor with a special foil surface captures the handwritten signature with a sampling rate of up to 500 Hz and 1,024 pressure levels. In addition, simple graphics and text information can also be shown on the display of the signotec Sigma.