The Geemarc CL 11 signals an incoming telephone call with an extremely loud signal tone (95 dB) and a bright light signal. Ideal for people who work in a noisy environment or sometimes don't hear the ringing of the normal phone due to hearing loss. The CL 11 is simply plugged in between the telephone and the telephone socket and is immediately ready for use. The CL11 draws the energy from the telephone socket. This means that the device is not operated with batteries and is not connected to the mains. The connectors are RJ connectors. The additional bell can be switched simply between your telephone and the telephone socket and incoming calls are signaled additionally. The cable from the additional CL 11 bell included in the delivery has a length of approx. 48 cm.This text is machine translated.