Voice Recognition Module

Voice Recognition Module
Voice recognition is a technique that facilitates a natural and convenient human-machine interface using the voice recognition module. It extracts and analyses voice features of humans delivered to a machine or computer through the mic. The Voice recognition technique is classified into many types based on different criteria such as the scope of the users, the number of words used for recognition, and the naturalness of speaking. If the voice recognition level is more than 95%, then only voice recognition is practically used. 
Speak (Voice) Recognition Sensor Module V3.1 compatible with Arduino is a compact and easy-control speaking recognition board. Speak (Voice) Recognition Module V3.1 product is a speaker-dependent voice recognition module. It supports up to 80 voice commands in all. Max 7 voice commands could work at the same time. Any sound could be trained as the command. Users need to train the module first before letting it recognize any voice command.
This board has 2 controlling ways: Serial Port (full function), General Input Pins (part of a function). General Output Pins on the board could generate several kinds of waves while the corresponding voice command was recognized.
Applications: 
Long-distance-speech-recognition system
A robotic vehicle using a cell phone
Package Includes:
1 x Voice Recognition Module V3.1
1 x Microphone.
Specifications
Supply Voltage
4.5 – 5.5 V
Current
<40 mA
Digital Interface
5V TTL level for UART interface and GPIO
Current
<40 mA 
Package Dimensions 
6 × 8 × 2 cm
Weight 
100 grams