ZMD Universal smart phone stand charging stand+4 USB port hub Features: * * Four downstream ports support high-speed (480Mbps), full-speed (12Mbps), and low-speed (1.5Mbps) * Supports up to 127 devices by daisy-chaining multiple hubs * Some power-intense USB devices may require a AC-Powered USB hub System requirements: * Mac OS 9.1 & higher * Windows 98SE /ME /2000 /XP /Vista /7/8 * Linux 2.4 or above Package contents * USB 2.0 4-port hub Warranty: This product comes with a three year warranty. In order for us to properly assist you, please follow these simple instructions: Go to sabrent.com/support and click 'Submit a ticket'. Submit your ticket. You must include your Amazon Order ID# number in the subject line.
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