The Pererro is a plug and play adapter for iOS devices which uses the built in Apple VoiceOver feature in combination with a basic switch.
ðə pəɹˈɛɹoʊ ɪz ɐ plˈʌɡ ænd plˈeɪ ɐdˈæptɚ fɔːɹ ˈaɪ ˌoʊˈɛs dɪvˈaɪsᵻz wˌɪtʃ jˈuːzᵻz ðə bˈɪlt ɪn ˈæpəl vˈɔɪs ˌoʊvɚ fˈiːtʃɚɹ ɪn kˌɑːmbᵻnˈeɪʃən wɪð ɐ bˈeɪsɪk swˈɪtʃ.