Isivalo somnyango sibuye saziwa ngokuthi yi-door touch.Kuphinde kube yithuluzi elimunca futhi libone iqabunga lesicabha ngemva kokuba livuliwe ukuze lingavalwa ngokushaywa umoya noma ukuthinta iqabunga lesicabha.Isivalo somnyango sihlukaniswe ngezinhlobo ezimbili: isivalo somnyango kazibuthe unomphela kanye nesivalo somnyango we-electromagnetic.Izivalo zeminyango zikazibuthe ezihlala njalo zivame ukusetshenziswa eminyango evamile futhi zingalawulwa ngesandla kuphela.Izivalo zeminyango ka-Electromagnetic zisetshenziswa emishinini elawulwa nge-elekthronikhi yeminyango namafasitela njengeminyango yomlilo, futhi inokubili ukulawula okwenziwa ngesandla kanye nemisebenzi yokulawula okuzenzakalelayo.