Key features dual core cpu with aes ni hardware encryption engine encryption performance at over 11301 mbs reading 11166 mbs writing advanced btrfs file system with built in data integrity check single h264 4k or triple full hd video transcoding on the fly hot swappable drive tray design for easy installation amp maintenance fulfill your needs for safe data storage and ultra high definition video sharing with synology diskstation ds216ii powered by an intel celeron dual core cpu ds2