Toshiba Wireless LAN Adapter and USB extension cable. Before listing, I confirmed the transfer and playback of recorded programs from Recorder A to B and Recorder B to A using the following connection: D-WL1====Recorder A ⚡︎ ⚡︎ ︎ ︎(Wireless) ⚡︎ WIFI Repeater : :(Wired) : Recorder B The recorders used were DBR-Z520 for Recorder A and DBR-W1007 for Recorder B. I performed a ping test to check the transfer efficiency. I believe the speed is not a problem. Please be aware of compatible models. https://archived.regza.com/regza/bd_dvd/lineup/option/LAN_adp/index_j.html To connect, Insert it into the USB_LAN port of the recorder, and then go to the main unit settings > network settings > wireless LAN > automatic wireless LAN detection to easily connect to your home LAN. The items are the two in the photos.