This is a self-adhesive unpolished disk with the diameter of 19mm and thickness of 3mm. This plate will easily stick on the back of any cellphones to protect from EMF exposure 

From the true Shungite in North-Wester part of Russia in Karelia. 

Shungite is a rare carbon-rich stone that may help work against pollutants, free radicals, and harmful germs. It also shields you from electromagnetic field (EMF) exposure. 

Benefits: 

• Purifies water
• May help reduce oxidative stress
• May help reduce inflammation

How to Use:

• Remove sticker and place it on or near EMF sources (cellphones, laptop, wifi-routers, microwaves, electronic devices) 
• Meditate with the stone