10/100 ports 0 10/100/1000 ports 8 Gig combo ports 2 Switch capacity (2GigE uplinks) 10/20 Gb/s Switch capacity (4GigE uplinks) 12/24 Gb/s Stacking capacity 10/20 Gb/s Operating temperature 0 C to +45 C ,32 F to +113 F Storage temperature -40 C to +75 C, -40 F to +167 F Humidity (operating and storage) 5% to 95% MTBF (hours) 695, 192 Power supply efficiency 85.6% Fanless design Yes Acoustic (dB) Silent System power consumption (watts)** 17W Heat dissipation (Btu) 58 PoE power budget N/A PoE device heat dissipation (Btu) N/A