How to check whether a LapShield is effective?

How to check if a LapShield is effective?

The LapShield effectively blocks the electromagnetic radiation and heat from a laptop computer. While your lap can easily feel how much heat is blocked, it is not obvious to check whether radiation is blocked effectively. There are several ways:

If you have a radiation meter or gauss meter, place the meter underneath the laptop computer. Compare the reading when a LapShield is installed and when it is not. You should see the reading is significantly lower when the LapShield is installed.

If you don't have such a radiation meter, you may wrap a working cell phone with a LapShield. Note you need to completely seal the cell phone with the LapShield so that there are no cracks that signals can go through. Hold it for a couple of minutes before you unwrap the LapShield. You should see the cell phone displays "no signal". (This method works with LapShield P Series only.)

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