Features:

• 4 GB storage capacity with 3.66 GB available
• Minimum write speeds of 15 Mbps
• Includes adapter for use with Memory Stick PRO compatible devices
• Transfer speed up to 160 Mbps
• 4 GB of storage for your compact digital camera, portable audio device, or PSP Handheld Entertainment System not for camcorders DCR series

Editor Reviews:

Product Description:
Sony's 4GB Memory Stick(R) PRO Duo media offers maximum storage for compact digital cameras, portable audio devices and your PSP Handheld Entertainment System. Providing durable, high-capacity digital file storage, the MSX-M4GS can be used in most Memory Stick(R) PRO media compatible devices. Get connected to your favorite multimedia anywhere with the powerful and compact Memory Stick(R) PRO Duo media.
Record and playback copy-protected digital media files from your desktop or notebook with Memory Stick(R) PRO Duo featuring MagicGate(TM) technology. Its unique encryption technology ensures protected content is only transferred between compliant devices and Memory Stick(R) media, preventing unauthorized copying or playback. Listen to favourite digital music files or dub audio tracks from your CD collection and enjoy them anywhere with Memory Stick(R) PRO Duo and MagicGate.
Whether capturing breathtaking digital images and video, enjoying music with friends, or transporting large and important files, Sony's ultra-compact Memory Stick(R) PRO Duo is always the perfect choice. Designed specifically for professional-quality compact digital cameras and entertainment devices, its ergonomic design makes it easy to insert and remove without hassle or fuss.

Rating : - It's FAKE. DO NOT BUY IT FROM Digital Media Source
IT'S FAKE. DO NOT BUY IT FROM Digital Media Source.

It's dead after 4 months. I called Sony support and sent it to Laredo, TX. Sony Repair Center in Laredo Texas sent it back and confirmed "FAKE".