Cisco Phone Adapter with 2 Phone Ports. Connectivity technology: Wired, Host interface: Ethernet. Data transfer rate (max): 1000 Mbit/s. Width: 101 mm, Depth: 28 mm, Height: 101 mm. Certification: FCC, CE. Operating temperature range (T-T): 0 - 45 °C, Storage temperature range (T-T): -25 - 70 °C, Operating relative humidity range: 10 - 90 %