With three modes: Loop detection mode: suitable for robot Q&A dialog toy. Command detection mode: suitable for household appliances control smart switch etc.. Button detection mode (it works better with wireless module): suitable for household appliances control smart switch etc.. Function: it can realize voice dialog and voice control. Usage: Use ASR setter. Exe to write input sentence and returned value; put the audio file named after this returned value under the SD card root directory; when the module detects the sentence it will play the audio file in the SD card and output the returned value via the serial port (use microcontroller to receive and process the returned value to build voice control system.)