Voice recognition module with Nuvoton ISD9160 based on CortexM0,which is responsible for speech recognition. A built-in omnidirectional microphone that will pick up sound from all sides. There is also a2-pin connectorforthe loudspeaker,which can respond to commands when properly programmed. The module has 22 English language commands uploaded.  The module is powered from 3V to 5 V.
WIKI :
https://wiki.seeedstudio.com/Grove-Speech_Recognizer/
 
This speech recognizer can recognize 22 pieces of commands including 'start', 'stop', 'Play music' and so on. Every time it recognizes a command, it will return a value and then the loudspeaker that connected to it will repeat the command. This value can be used to control other devices like motor, music player. We have tested it for hours to make sure it possesses a high recognition rate and a very low false trigger.
Here are some notes that you must know before using it:
 
Awaken Word:    Hicell      (Please pronounce it as one word)
 
When it recognizes the awaken word, LED turn red, then you can say the command word, if it recognize the command word, LED will turn blue.