USB Data Blocker. USB Data Blockers Are a Handy & Increasingly Important Device That Help to Keep You Safe When Charger Your Devices in Public. Branded Data Blockers Prevent Hackers From Gaining Access to Your Device & Capturing Your Data. Available in a Clean White Finish, These Compact Devices Can be Branded Using Full Colour Print. Also Available in Black with Moq of 500. Minimum Quantity: 10