This BT Synergy 5500 cordless telephone twin pack offers you the freedom to talk and walk around your house up to 50 meters or outside up to 300 meters. A 10 hour talk-time battery life ensures plenty of power to handle even the longest of conversations, whilst the built-in memory can store up to 250 names and numbers giving you quick access to friends and family with the touch of a few buttons. These cordless telephones feature a caller display with a 30 number call log, a text messaging facility with storage for 50 messages, and with the built-in SIM card reader and writer you can transfer and store your contacts direct to these BT Synergy phones effortlessly. An answering machine is also built-in with up to 12 minutes recording time for those times when you can't answer the phone, and 20 ringer melodies to choose from to keep you amused for those days when a simple ring tone just isn't enough.