One of the most beneficial uses of the shungite is to protect against electrical magnetic fields, also known as EMFs. We are constantly surrounded by technology - cell phones, computers, televisions, Wifi and the list goes on and on.
*Apple event has a disclaimer encouraging you to not hold your phone directly to your head.*
Fortunately, there is protection from this.
About the product and instalation
Best option - if the shungite will touch your hands, i recommend to stick it openly on the back of the phone or on the case - if you use it. On a laptop, place one each under your wrists.
Shungite stickers have no expire date on their effectiveness. The greatest impact on their duration is how customers treat their devices.
Yes, you can reuse them on another device. To remove the sticker easily, turn off the device, heat the sticker with a hair dryer on medium power, pry it off with something flat, like a plastic card.