Liger&trade; Digital 4-Port High-Speed USB Hub with Built-In cable & Durable Aluminum Casing For iMac, MacBook, MacBook Pro, MacBook Air, Mac Mini, or any PC Provides 4 High-Speed USB ports for additional peripherals Replaces less-capable hubs with compact multi-port design Supports USB 2.0 spec up to 500mA per port,  5v Power adapter included for extra power Data transfer speeds up to 480 MbpsProvide quick and easy transfer of your photos, music and files.,Built-in surge protection keeps your devices and data safe and supports hot swapping  Compatible with Windows XP/Vista/7/ & Mac  Great for easy connections to MP3 players, flash drives and similar USB devices What You Get:  4-Port High-Speed USB Hub  USB Cable (Built-in)