Allows simultaneous operation of up to four separate devices all attached to a single USB port - Self/bus powered or external AC powered - Per port over current detection and protection - Compatible with USB 2.0 and 1.1 support full speed up to 480 Mbps - Supports Windows 98/SE/2000/ME/XP/Mac OSX - Comes with 100~240V US plug AC power adapter - Perfect for connecting USB 1.1 or 2.0 peripherals such as USB mice USB Portable Hard Drives USB CD- R/RW or DVD-ROM drives and USB 1.1 hubs - Package included: - 1 * 4-Port USB HUB - 1 * USB 2.0 cable - 1 * 100~240V US plug AC power adapter - 1 * English user manual