USB-A Hub with built-in active extension cable 78.7ft and USB 2.0 ports (x4) - Booster chip allows the 4-port USB Hub for laptop/desktop to maintain signal quality; Included power adapter 5V/2A DC for devices requiring additional power (5V/0.5A per port) - Maximum range of 157.4ft by daisy-chaining two USB extender Hubs - 4-port USB extender cable supports wake-on-USB to remotely wake host; Backward compatible; Driverless and works on any OS; Level 4 ESD protection (15kV air/8kV contact) This product ships in approximately 1 days