Features:
100% brand new and high quality
onboard complex frequency decoder chip MT8870
voice input interface board
onboard five LED indicators for easy viewing output state
the chip have been drawn mainly basic pin

Specifications:
PCB size: 26.5 (mm) x 24.5 (mm)
Color: Blue

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 includes:
1 x MT8870 DTMF Audio Decoder Speech Decoding Module