Add 1 KX-FKD558-W to the KX-PD350DL-W (with 1 extension unit) to create a set of 2 consoles. (Parent unit, other accessories, KX-FKD558-W x 2, charging stand x 2, instruction manual (English language not guaranteed). Equipped with a "annoying prevention" function that sends a warning message to your opponent before you hear the call sound; displays the absence of call history (date and time only); Can be left in place of a note for convenient recording of calls; Prevents theft in the event of a security in the event of a power outage. battery pack (sold separately). and you can talk about 1 hour even during a power outage.