... speaker circuit. OTP voice chip ,sound chip, Voice IC--170 seconds OTP voice chip, IC chip, voice chips, sound chip, sound ics Features*170s ... control modes: key mode(keyboard), key combination mode(key array), parallel port mode(COM+SBT), serial port mode.*BUSY ... second after stop working or without any action after electrify chip, it will be sleep automatically.*Powerful programmability, can be ...