Who need SVA-01 Detector?
Government officials, business people and whoever are careful of their voice data should have SVA-01 detector! You can carry SVA-01 detector with you everywhere. No body knows SVA-01 detector is a detector because it just looks like an ordinary small case.
The Principle of Operating
Put the cell phone in SVA-01 detector case. If the cell phone is activated but the display still stays on standby mode, it means that the transmitter of the cell phone is unauthorized switched on. This electromagnetic field change of the cell phone is detected by the SVA-01 detector and then SVA-01 detector will turn on the built-in noise generator to warn you!