1.Hi-Tech products. 2.Effective for rooms. 3.Good Quality and Long Life. 4.Hot products. Principle:1.HI-Tech Products.It can produce a kind of very special Low-Frequency Electromagnetic waves.Which can disturb the Pests' Nervous system and Hear System.Then they can't bear and run away.2.According to ultrasound wave principle,producing conversion and steady ultrasound wave frequency,then driving ...
