1,Wi-Fi Detector Shirt 2,the size:xs,s,m,l,xl,xxl 3,Shows signal strength for 802.11b or 802.11g ... 4,100% Cotton 5,CE,SGS Wi-Fi Detector ShirtWi-Fi Signal Status for You and the World!Here at ThinkGeek we ... .Product FeaturesGlowing animated shirt dynamically displays the current wi-fi signal strength. Shows signal strength for 802.11b or 802.11g Black 100 ...