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Amazon.com: VISLONE DTMF Module 5-24VDC Audio Generator Module Voice Dual Encoder Transmitters Board Keyboard for MT8870/CE004/CE005/CE023/AD22B04/AD22A08 : Electronics
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DTMF GENERATOR CLICK MIKROE - Click board | DTMF; GPIO; HT9200A; prototype board; 3.3VDC,5VDC; MIKROE-4298 | TME - Electronic components
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