Athena Computer Power AP-MFATX25 Flex ATX 250W for Mini-ITX Servers Output Power: 250 Watt. Input Voltage: 88 -264 Volts Ac Frequency: 60/50 Hz. Temperature Range: Operating 0 degrees C ~ +25 degrees C on 250W Output Load or 0 degrees C ~ +50 Humidity: 5 ~ 90% on Operating&#44; 5 ~ 95% on Storage.