The RePhone Extension Pack includes 6 rich-featured add-on modules for you to extend the functionalities of your RePhone project. The pack includes Xadow LED 5x7, Xadow NFC v2, Xadow Duino, Xadow GSM Breakout, Xadow Basic Sensors and Xadow GPS v2.FeaturesSlim and small modular designStackable and chainableXadow Basic Sensors, Xadow LED 5x7 and Xadow Duino have Plug and play feature with RePhone Kit • Create