HP Ethernet 1Gb 4-port 331T Adapter - Manual (Page 12)

Specifications 12
Power and environmental specifications
Specification Value
Operating Temperature—0° to 55° C (32° to 131° F)
Humidity—10 to 90% relative humidity, non-condensing
Non-operating Temperature—-65° to 85° C (-85° to 185° F)
Humidity—5 to 95% relative humidity, non-condensing
Power 2.1 W typical, 2.2 W maximum (without IEEE partner)
1.7 W typical, 2.2 W maximum (with IEEE partner)