One base unit and four extension cordless phones. One transformer is missing so treat it as three-way, or order a new transformer.
Phones require AAA NiNH rechargeable batteries. These are NOT provided, but they are easily obtainable.
The base unit will plug into an *analogue* BT phone socket. The old analogue master sockets are being phased out, but this will work with a Virgin cable analogue line, a Cisco VOIP phone adapter, or a multitude of other services and devices that still support the old BT phone line-type connection.
Phone and charger units are colour coordinated, so they all get returned to their rightful place. The charger units will sit on a flat surface, or can be mounted on the wall.