Loud indoor bell ringer suitable for warehouses, large offices, garages, shop floors etc. Plugs into a standard BT socket and does not require an external power source. You will need a spare incoming BT socket or a two-way adapter (RS 7378215) to install this product. It is easy to install, just plug in and play.

Two 50mm dia. bell domes (77 dB)
Two x 2kΩ bell actuators for parallel connection
REN 1
Cable lenght - 3m.

Telephone lines usually have a REN value of 4 meaning they can operate up to four telephone products (e.g., phones, fax, answering machine) each with a REN of 1. If any customers experience issues in using this or any other additional item via their phone sockets it may be that they are exceeding their REN.