The Eco USB Data Blocker 2.0 protects your smartphone or tablets from any unwanted data transfer, and without the risk of hacking or the uploading of viruses while charging. For the environmentally aware user, simply plug the data blocker into any USB charge port before plugging your charge cable in between the data blocker and your device to start charging. Includes standard backing card with instructions or custom-designed cards. Material: Wheat Straw, ABS.