... , easy for carry 4 Port USB Hub with 4 slide USB ON/OFF Switch, USB 4 Port Hub, USB 2.0 Hub, USB Hub (Slim design) - (ZW-21005) ... 1. Slim design 2. 4 Upstream & downstream USB ... and Hot Swappable capability 4 Port USB Hub with 4 slide USB ON/OFF Switch, USB 4 Port Hub, USB 2.0 Hub, USB Hub (Slim design) - (ZW- ...