Here is a LED name tag that you can customize with your smartphone. The Coolbird Bluetooth LED Name Tag has 11 x 44 pixels. It combines with your smartphone to let you display messages anywhere. This LED sign runs on a 210mAh battery that lasts 10 hours. It has 3 adjustable brightness levels.
The Coolbird Bluetooth Name Tag is compatible with iOS and Android devices. It supports 13 languages. You can find out more about it here.