YuHoves 10 Pack Key Ring 4GB Stainless Steel Metal USB 2.0 Flash Drive (YH-001-4) Fast USB 2.0 interface,includes 10 PACK of 4GB Usb Flash Drive. Full metallic unibody capless design, just plug and play. Advanced UDP flash chip and high quality sealing technology ensures its resistance to water, dust and vibration. The stylish metal ring make it a perfect accessory for your keychains, briefcases or your badge holders. Best Warranty: Lifetime Manufacturer.