The "T-Wifi" Wi Fi detector T Shirt features a transmission tower style design that flashes to display the current Wi Fi signal strength in the surrounding area. It looks a bit like a radioactive hazard or x-ray warning sign, but thankfully Wi Fi is a lot less harmful than those! Perfect for anyone who prefers to get online whilst out & about & is the simplest & best way to find that perfect surfing spot in a Wi Fi enabled coffee shop or café – or just whenever the need to check email strikes! The thin, flexible light-up panel on the front of this Wi Fi detector T Shirt has a battery powered Wi Fi sensor that tucks away in a pocket on the inside of the shirt. The sensor pack can be removed for h&-washing the shirt. A great gift for anyone who can’t bear to be offline "T-Wi Fi" T-shirts also make an excellent promotional giveaway for phone companies, network operators or retailers who are promoting Wi Fi accessibility. "T-Wi Fi" Wi Fi Detector T Shirt Glowing animated shirt Transmission tower design that flashes a green signal Displays the current Wi Fi signal strength Black 100% Cotton Hand wash only Black 100% Cotton Do not iron over plastics Powered by a battery Wi Fi sensor that tucks away in a pocket on the inside of the shirt