Secure and reliable storage: Each flash has undergone full-byte comparison and selects the best quality particles Dual Type-C and USB 3.1 Connectors Humanization design: 360° rotation protecting cap design prevent cap losing Free up memory on your smartphone USB 3.1 interface: stable and efficient file transfers Zinc alloy material casing design: durable and textured Fully data protection: UDP integrated encapsulation provides you protection against dust, water and temperature and shock resistant The flash drive has a small hole on the casing through which you can thread the chain. By attaching it to your keychain or bag handle, you can protect yourself from losing the device and the files on it.