We have our factory and registered on alibaba.com,be professional in memory card,memory stick and card reader.

Detailed Product Description
Features:
1) Minimum of 20MB/s sequential read speed for ultra-fast image viewing
and data transfer
2) Minimum of 20MB/s sequential write speed lets you capture large
image files faster
3) 1-year warranty
4) Low power consumption for longer battery life
5) Memory capacity: 8GB, 4GB, 2GB, 1GB

Specifications:
1) Operating temperature: 0 - 55oC (32 - 131oF)
2) Storage temperature: 20 - 65oC (-4 - 149oF)
3) Operation / storage humidity: 30 - 80% RH (not condensed)
4) Range: 128MB - 4.0GB
5) Applied to different electronic devices, such as digital cameras,
electronic books, handheld PCs, mobile phones, PCs and music players
6) Usually used for mobile phones
7) Available capacity: 1GB, 2GB, 4GB