ADD EXTRA USB PORTS FOR LAPTOP AND EXPAND ITS POTENTIAL - with USB port expander or multi USB adapter for laptop you can connect up to bitcoin miners, electronic gadgets or USB peripherals WIDE COMPATIBILITY - powered multi USB hub for computer supports the most OS: Windows XP/Vista/7/8/10; Mac OS; Linux and compatible with miner or cellphone as well as with keyboard or mouse COMPUTER HUBS WITH FAST DATA TRANSMISSION - multi port USB hub or USB connector for multiple devices ensures fast data transmission even when all ports are in use PLUG-AND-PLAY INSTALLATION - external USB hub multi adapter is easy to install - just connect USB power hub charger to laptop and it's ready to be used (USB cable included) RELIABLE AND SAFE - USB multiple port hub with security module and overheat protection is made of aluminum alloy; LEDs, slip-resistant elements and brackets with screws - for convenient use