the UMH Cell Phone Disc, is your ultimate EMF protection solution for cell phones, tablets, and laptops. This innovative device effortlessly adheres to your device, instantly providing EMF protection. Compatible with all mobile devices and radio frequencies, including GSM UMTS, Bluetooth, Dect, WiFi, and 2.4 - 5.0 GHz signals, the Cell Phone Disc harmonizes the EMF field, ensuring safe usage.