The instruction manual can easily be found by searching "BT Synergy 4500 manual". An extra handset is included for free as it is faulty. A phone lead is also included for free as it is untested. 2x base units - one of which is the answering machine.
BT Synergy 4500 Trio - Digital Cordless Phone inc Answering Machine 3x Telephone
BT Synergy 4500 Trio Digital Cordless Telephone Handset with Answering Machine
BT Synergy 4500 - Replacement Additional Charging Dock & Power Cable
4 x BT Synergy 4500 5100 5500 6500 Rechargeable AAA 900mAh Batteries
3 BT Synergy 4500 - Digital Cordless Phone + Answering Machine 3x Telephones
BT Synergy 4500 Twin Cordless phones with Answering Machine Needs Batteries