Switch access could be activated either through an external bluetooth connected switch, single touch of the screen, or use of right and left head turns using the device's camera.
swˈɪtʃ ˈæksɛs kʊd biː ˈæktᵻvˌeɪɾᵻd ˈiːðɚ θɹuː ɐn ɛkstˈɜːnəl blˈuːtuːθ kənˈɛktᵻd swˈɪtʃ, sˈɪŋɡəl tˈʌtʃ ʌvðə skɹˈiːn, ɔːɹ jˈuːs ʌv ɹˈaɪt ænd lˈɛft hˈɛd tˈɜːnz jˈuːzɪŋ ðə dɪvˈaɪsᵻz kˈæmɹə.