With this module, up to 5 Bluetooth® headsets can be paired with a FON-560i phone. Just plug the FF-65b directly into the top of the phone; no screws, no hassles. When using a good quality headset, you will be able to control the On/Off hook status of the phone using the headset. The range of a Bluetooth headset used with the FON-560i is approximately 30 feet (10m). Range and quality will vary depending on obstacles and other wireless devices in close proximity.
In order to operate the FF-65b Bluetooth module, the FON-560i must be running firmware version 1.1.06 or higher.
THIS WILL NOR WORK ON THE 550I phone.