Linkase - Compatible with iPhone 5 and 5S | Coal Black - Wi-Fi Signal Booster (Fits At&t, Verizon, and Sprint iPhone 5/5S) Black Friday Deals! Starts 11/28/20138:00pm PST Ends 11/29/201311:59pm PST. Don't miss this great chance for your last minute Christmas shopping! EMW (Electro Magnetic Waveguide) is the latest signal-enhancing technology incorporated into some of Absolute Technology's cases It will resonate with your mobile device's antenna to provide seriously improved WiFi signal performance. 360 degree reception. Non-slip Soft Touch. Additional EMW Element included Wifi booster for iPhone 5, iPhone 5S, & iPad Mini