... chip, IC chip, sound chip 1. 170 sec duration time 2. Built-in direct drive speaker circuit. OTP voice ... air conditioner and so on).* Intercom, Building intercom, video door phone, door bell, MIDI, system of talk backing, Window control, Intrusion ... audio books)* Medical equipment, Apparatus, Meters, Interment.* Industrial Control system and any other products need voice messages. Melody voice IC--170 ...