Linksys Powerline 4-Port Network Adapter. Connectivity technology: Wired, Host interface: Ethernet. Modulation: QAM 256/64/16, DQPSK, DBPSK, ROBO. Width: 148 mm, Depth: 35 mm, Height: 103 mm. Certification: FCC, IC, CE. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -20 - 60 °C, Operating relative humidity range: 10 - 80 %