This Powered 4 Port USB hub comes with an external power adapter to inject power to your devices without drawing extra power from the Raspberry Pi.
(edit with the Customer Reassurance module)
(edit with the Customer Reassurance module)
(edit with the Customer Reassurance module)
Features:
If you want 7 ports, we recommend the 7 Port USB Hub for Raspberry Pi or the 7 Port USB Hub with Individual Switches! These are a better value and you can use them with your existing 5V power supplies to inject as much power as you need!