XBLUE, we will be doing our best for your health, trust, convenience, and needs.<br><br> [Key Features]<br>- Protect US from WiFi router's RF (EMF) electromagnetic waves. <br>- Block router's RF at average 95.6% without any side effect (by our measurement) <br>- Protect the RF using 2 ways: Reflect and Absorb, RF Radiation Shield<br>- Materials: Polyester, Silver, Copper, Carbon based plastic <br>- inch Size: (outer) 8.7" x 6.7" <br>- cm Size: (outer) 22cm x 17 cm <br>- REAL HANDMADE, DESIGNED and MADE in KOREA <br><br>[How to use] <br>- Need to cover your router antenna fully <br>- Using Direction: white mesh needs to be front side<br>- Applicable for any types of WiFi routers <br>- Recommend considering and purchasing a little bit larger size after checking your router size