BT Modular Jack, Ringer

Extension Tone Caller II

The Tone Caller from BT, with its loud adjustable tone makes it easier to know when your phone is ringing. It features an extra audible alert if you are having problems hearing your telephone ring. With a choice of 4 different pitch settings and a volume control, plug this additional bell into a spare telephone socket or use a socket adaptor(RS 7378215) to plug it in beside your existing phone