... speaker circuit. OTP voice chip ,sound chip, Voice IC--170 seconds OTP voice chip, IC chip, voice chips, sound chip, sound ics Features*170s ... second after stop working or without any action after electrify chip, it will be sleep automatically.*Powerful programmability, can ... cookers, air conditioner and so on).* Intercom, Building intercom, video door phone, door bell, MIDI, system of talk backing, ...