this system can prevent the poison 、destroy from the competitors, record the evidence to claim for compensation and keep the stranger away.

Mr Wang lived near the sea.? he had one fishpond and three breed plant. on night , he was playing mah-jong with his friend, Some one was trying to put poison to his fishpond, the outside safety radar spoke and recorded? coinstantaneously, which scared the criminal away. After that , Mr wang called the police and give the record evidence so that the criminal was captured very easily.