The HT9170D DTMF Decoder Module signal either from an audio source or phone line to 4 bit binary TTL(5V) level output. It also indicates outputs with LED. Can be used directly with microcontrollers to develop various DTMF related applications like remote monitoring, remote control, Caller ID, Auto Dialer, Remote Triggering etc. Package Includes: 1 x HT9170D DTMF Decoder Module 1 x Aux Cable
