ITEM NAME:MT8870 DTMF Voice Decoder Module Telephone audio Decoder Speech decoding mo C2I9 MT8870 DTMF Voice Decoder Module Telephone audio Decoder Speech decoding mo C2I9 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 PCB size: 26.5 (mm) x24.5 (mm) colour: blue Material: CCL Package Included: 1 x MT8870 DTMF Voice Decoder Module Telephone/ audio Decoder Speech decoding module Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.