Cables Unlimited 4 Port Mini USB 2.0 Hub Bus Powered. Data transfer rate: 480 Mbit/s. Operating temperature range (T-T): 5 - 50 °C, Storage temperature range (T-T): -20 - 60 °C, Operating relative humidity range: 0 - 80 %. Cables included: USB. Interface: USB. Compatible operating systems: Window 98se/2000/XP/Vista Mac 10+