![DTMF Shield DTMF Shield](https://www.botnroll.com/3399-medium_default/dtmf-shield-.jpg)
This Shield is a Dual-tone multi-frequency signaling module decoder for Arduino With it's audio connector you can decode the crazy funny noises common phones make.
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This Shield is a Dual-tone multi-frequency signaling module decoder for Arduino With it's audio connector you can decode the crazy funny noises common phones make.