Introduction - If you have any usage issues, please Google them yourself
MT8880 generate send and receive decoding the use of an integrated circuit, DTMF bi-directional transmit/receive IC MT8880 specifically for the dual audio signal of closing, hair design, it not only generated to send the audio signal, but also two-tone The signal receiving decoder can also determine a variety of tones (dial tone, ring back tone, busy tone).-Good has been tested.