What is the little plastic container very small that has a metal bead in it?
This small clear plastic container with a tiny metal bead is a PEMF tester. It is used to check whether the PEMF (pulsed electromagnetic field) function is working.
We cannot feel PEMF ourselves, but if the metal bead moves inside the container when the PEMF function is ON, it means the system is operating correctly.
The movement is a reaction to the magnetic field pulses. It becomes stronger when the tester is closer to the PEMF coils (there are three coils in the upper part of the mat) and decreases as you move farther away.
A similar PEMF indicator function is built into the controller — you can see blinking or running lights there when PEMF is ON.
Please check this video:
You can also make a simple tester yourself. Place a very small piece of metal (for example, a staple) into a lightweight plastic cup and use it to check the PEMF function.
When you press the PEMF button, the function becomes active for 20 minutes every 2 hours during the mat’s active session.