ATR is the ideal device to hear the noisy local calls, to identify your phone open offices in high-density phones in use, to help the weak hearing: controls volume, tone and rhythm sound permit to perceive clearly the alarm in any difficult condition. Adjusting the volume continues from off a extra high (up to 95 dB) Adjustable pitch (from bass to treble) Adjusting the pace of alarm (slow, fast) Powerful LED incoming call synchronous Ringer Modular Connection to City bus Connecting to a modular phone Also installed wall Power through feeder / adapter Included cable connection plug / plug Blister Packaging for improved presentation device Dimensions: 130 x 850 x 45 mm Weight: 130 g