Panasonic High Definition Power Line Communication Ethernet Adaptor- Twin Pack Connect Through Any AC Outlet in Your Home. The HD-PLC (High Definition Power Line Communication) ethernet adaptor, enables your home electrical wiring to serve as a link between your PC and modem. Easy Setup - No PC Required Fast, Reliable and Secure; with speeds up to 210 Mbps, advanced error correction, and AES 128-bit encryption, the BL-PA300A provides peace of mind at the speed of light. Max. Recommended devices per adaptor: 8 Interface 10 Base-T/100Base-TX Auto MDI/MDI-X