These phones are easy to configure, there are two but only one phone socket enough plugs into the second sector. The sound is good, and the batteries last long, there is the speakerphone function is an asset. You can buy without hesitation, one of the best quality / PRICE on the market. Be careful though if your primary phone is connected to an ADSL modem, in fact if you unplug the modem by accident or otherwise, they are a little unnerving to call into service, it will not be enough to reconnect the modem, but it will also disconnect all the son of two phones and reconnect them, and the rest on their base, synchronization should be so alone.