Overview: Allows simultaneous operation of up to four separate devices all attached to a single USB (Universal Serial Bus) port Per port over current detection & protection Compatible with USB (Universal Serial Bus) 2.0 & 1.1, support full speed up to 480 Mbps Supports Windows 98/SE/2000/ME/XP/ Mac OSXComes with 100~240V US plug AC power adapter Perfect for connecting USB (Universal Serial Bus) 1.1 or 2.0 peripherals such as USB (Universal Serial Bus) mice, USB (Universal Serial Bus) Portable Hard Drives, USB (Universal Serial Bus) CD-R/RW or DVD-ROM drives & USB (Universal Serial Bus) 1.1 hubs Package included:1 4-Port USB (Universal Serial Bus) HUB1 USB (Universal Serial Bus) 2.0 cable 1 100~240V US plug AC power adapter 1 English user manual Specification: Weight Approx:185.2g Size Approx:7.7 x 7.7 x 2.5