MT8870 DTMF Audio Voice Telephone Speech Decoder Board Module LED Indicators With Pins

MT8870 DTMF audio Decoder Speech decoding module Voice Module1, onboard complex frequency decoder chip MT88702, voice input interface board3, onboard five LED indicators for easy viewing output state4, the chip have been drawn mainly basic pin5, PCB size: 26.5 (mm) x24.5 (mm) Note: PCB design, VCC pin and GND pin are in the opposite position, please be caution!The VCC pin should be the GND pin , and the GND pin should be the VCC pin.Package included:1 x MT8870 DTMF audio Decoder Speech decoding module Voice Module