Portable Revolving Keyring Aluminum Alloy USB 2.0 Flash Drive (4GB)
Anti-shock dampproof anti electromagnetic wave; USB bus power supply: 4.5~5.5V; Working current: <50mA; Working temperature: 0~60'C; Storage temperature: -20~85'C; Hot swapping no drive needed; Rewrite time: >1000000 times; Actual capacity: 3.7GB