An inverted strain relief for receiving a coaxial cable has a housing with a bore therethrough defining first and second apertures in opposing surfaces of the housing. A storage module stores the message. The bores are disposed in the planar surface and extend through the elongated members. The first wireless power receiver is configured to receive power transmitted across the prespecified distance from the first wireless power transmitter, and to provide power to the first end of the transmission link, for transmission to charge the battery.