Features:Brand new and high quality. Ultra portable, slim, small card design. Simple, as easy as plug and play. Economical, low power consumption for better device battery life. Secure, build-in write-protect switch prevents accidental data loss. Fast transfer rate for reliable copy/download/backup. Non-volatile solid-state, no moving parts maximizes battery power. Data is not lost when power is turned off. Low battery consumption to maximize battery life in small portable devices. User selectable mechanical write protect switch on the exterior card casing. Operating shock rating of 2,000Gs, equivalent to a 10-foot drop to the floor. Capacities: 4GB. (1 Megabyte(MB) = 1,000,000 bytes; 1 Gigabyte (GB) = 1,000,000,000 bytes). Compliant with the Micro SD / TF card association specifications.