StarTech.com 4 Port Portable USB 2.0 Hub w/ Built-in Cable - 4 Port USB Hub POS Terminal Accessory Kit users can control a relay

users can control a relay device such as the rise and fall of a projector screen over RELAY ports

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StarTech.com 4 Port Portable USB 2.0 Hub w/ Built-in Cable - 4 Port USB Hub POS Terminal Accessory Kit users can control a relayStarTech. com 4 Port Portable USB 2. 0 Hub w Built in Cable 4 Port USB Hub Here's a simple and cost effective way to expand your computer's connectivity by adding extra USB ports. This 4 port USB hubturns a single USB connection into four connectionsand features a compact, USB powered design that makes it perfect for travel. The hub also features a small footprint housing, which means it takes up less desk space. Add USB ports, virtually anywhere you