There are many possibilities:

• Windows: The best and the most versatile option is to use Quha Dwell software. Other dwell clickers are also compatible with Quha Zono and Zono 2.
• Mac: Dwell selection functionality is part of the accessibility settings in System Preferences -> Accessibility -> Keyboard -> Accessibility Keyboard -> Options. Tutorial video available.
• Chrome OS: Dwell selection can be activated in Accessibility -> Automatic clicks
• Android: EaseMouse application can be purchased from Play Store or from Quha.
• iPad: Settings App -> Accessibility -> Touch -> AssistiveTouch > Dwell Control. Tutorial video available.