Quantum holograms are infused with scaler light wave technology and quantum energy information. These are a must have on any cell phone, electronic device, refrigerator, outlet, powerstrip, laptop, portable tools, tablet, and any electronic device. These reduce the emf waves making them less harmful. They also send quantum information to our body. You’ll feel a difference with one on your phone as well as many around your home, office, and garage. Yes, there are a few for less money and many for more money. Simply put these work and are amazing for the price.