Ningbo Hifi-Change Electric Co., Ltd. was established by a group of thoughtful people. They are always thinking: what can we do for human health. Based on this, they work very hard and spend all time in the technical improvement, quality control, market research, customer services etc. Star product "RATMAN" was born in the joint efforts of the whole company personnel. But they didn't just stop there. In order to prevent and reduce the pests' problems for humans, this group of thoughtful people will continue to go ahead.