C2G USB 1.1 Superbooster Extender for Interactive WhiteboardsOne of the only solutions on the market designed and engineered for compatibility with 300 series and 500 series Promethean, SMART, and other interactive whiteboard (IWB) models, the new USB 1. 1 Superbooster Extender for Interactive Whiteboards is perfect for extending 1. 1 signals up to 40m (131ft) to support any interactive whiteboard. Other USB extension solutions use a chipset that is incompatible with interactive whiteboards which can cause