DTMF Module 5-24VDC Audio Generator Module Voice Dual Encoder Transmitters Board Keyboard for MT8870/CE004/CE005/CE023/AD22B04/AD22A08

Features:
The module is designed for dialing keyboard and MCU interface.
Can instruct MCU(or keyboard) to generate 16 dual tones from Audio 1/2.
The DTMF module equipped with two 3.5mm audio plug for same times using.
Wide voltage range,you can connect it with voltage from 5~24VDC.
There are 7 MCU input interface on the module.