The USB 4-Port Micro Hub from Belkin lets you connect up to four USB devices with easy, Plug-and-Play anywhere you take your laptop. With USB connectivity, you get fast, reliable data transfers for a variety of devices. Its compact size and advanced functionality make it the ideal accessory to include inside your laptop case-a great solution for today's mobile professional. Advantages USB connections for up to 4 devices Installs easily, with Plug-and-Play functionality Features compact size and USB reliability-ideal for use on the road Offers the ease and reliability of USB data transfer SPECIFICATIONS: Upstream Ports 1 Downstream Ports 4 Per-Port Voltage DC +5V Per-Port Current 100mA (500mA in self-powered mode) Power Mode Bus-powered (self-powered when used with optional power supply) LEDs 1 Green Power LED Power Supply Optional 5-volt, 2.5-Amp Compliance USB specification version 1.1 Certifications FCC Class B, CE, C-Tick