Vispero Freedom Scientific RUBY 10 Manual page 86

RUBY 10 Speech only: Move the bottom slider left to slow the rate of
speech or right to increase it.
For immediate feedback confirming your actions, RUBY 10 vibrates briefly
when you press a physical button or tap a software control (e.g., a
checkbox, radio button, toggle switch, icon, or on-screen button).
Tap the Touch Vibration toggle at the bottom of the screen to enable or
disable tactile response. A tap or short press results in one vibration. A long
press, about 1 second, results in two vibrations. When you display the
online help by pressing and holding a software control for 3 seconds, or
power down holding down the Power button for 7 seconds, three vibrations
occur.
80 RUBY 10 Advanced Features and Functions