The UMH Cell Phone Disc simply sticks to your cell phone, tablet or laptop, and the EMF protection is in place. Suitable for all mobile devices and radio frequencies such as: GSM UMTS, Bluetooth, Dect, WiFi, and 2.4 – 5.0 GHz signals, and more. It harmonizes the EMF field for your device, making it safe for you to use.

Specs:

• Effective operating radius: 1 electronic device
• Diameter: 3 cm / 1.2 in
• Thickness: 3 mm / 0.1 in
• Weight: 5 g / 0.17 oz
• Material: 100% silicon dioxide (quartz crystal)