Kingston Technology 256MB. Internal memory: 256 MB, Memory clock speed: 133 MHz. Serial page access: 12 ms, Random access: 14 ms, Access time: 9 ms. Operating temperature range (T-T): 10 - 35 °C, Operating relative humidity range: 10 - 80 %. Compatibility: PC, Processor clock speed: 133 MHz, Compatible operating systems: Any