Voice Recognition Module can recognize your voice. It receives configuration commands or responds through serial port interface. With this module, you can control your car or other electrical devices by voice.
Voice Recognition Module can store up to 15 pieces of voice instructions. Those 15 pieces are divided into 3 groups, with 5 in each group. First you should train the module with voice instructions group by group. Voice Recognition Module is speaker dependent. If you trained the module, your friend might not be able to make it work.