Batteries probably no longer good
BT Synergy 5500 Twin Cordless Phones Answer Machine Call Blocker Boxed
BT Synergy 5500 Twin Additional Replacement Handset & Base Tested Fully Working
BT Synergy 5500 Twin Handsets With Answering Machine And 1 With Standard Base
Retro BT Synergy 700 Twin Cordless Phone Set - GY931D
BT Synergy 4500 Twin Cordless phones with Answering Machine Needs Batteries
BT Synergy 4100 twin handsets, black, with charger bases, in good working order.
