SanDisk and Sony improved the shape of Memory Stick Micro media to allow reduction in the connector height and width in host devices. The companies also devised a function to prevent the memory card from jumping out when ejecting. With a dedicated adaptor, Memory Stick PRO compatible devices can be used to write onto and read Memory Stick Micro media. Key specifications of the Memory Stick Micro format are as follows: peak data transmission rate is 20 MB per second. Maximum capacity is 32 GB. The connector is 11-pin type. Low voltage operation at +1.8 V is available, as well as 2.7-3.6 V, at which Memory Stick PRO compatible products operate. Both serial and 4-bit parallel interfaces are equipped. Operating temperature extends from -25 degrees to +85 degrees. "MagicGate" technology is used for copyright protection.