Voice or speech recognition is a technology machine listen and execute to human voice without mechanical Operation like keyboard and mouse Voice recognition technology makes such a producer possible, and needs "voice composition" technology Composing human voice and "treatment of natural language " technology recognizes meaning of the voice for practical use as well as "voice recognition" technology listens and recognizes human voice Technology: Speaker independence, it is operated by non-specific speakers and can find out voice characteristic of any speaker Available of variable vocabularies Continuous voice recognition function Available of dividing man and woman voice (algorism of voice recognition automatically selects models in real-time) Core sentence recognition function Noise learning function Model real-time adaptable function Cancellation rate for wrong operation: 99% Far talking: 95% recognition rate at 3m range with 47dB directional microphone Application: Home automation: Home theater, light switch, air conditioner, gas valve, blinder, curtain control, sprinkler control Home networks: Outside mobile phone control system Connecting with wall pad Voice identification Communication among voice commands - Connecting with Zigbee, Radio Frequency, PLC, Tel line, IR