HK High Speed 10 Ports USB 2.0 HUB Expansion + AC Power Adapter High-speed USB 2.0 interface Up to 480Mbps Compatible with USB 1.1 devices Design with anti-surge protection Shielded magnetic A-&gt; B cable Operating voltage: 5V Operating Current: 500mA Operating temperature:-20C - 75C Storage temperature:-40C - 85C.