High volume, up to 100dB (A) * Continuously adjustable * Three different sounds can be set * Optical call signaling through flashes of light * High light output with indirect and diffuse lighting * Flash rate adjustable from 3 to 8 flashes/sec. * Adjustable to flash only / acoustic only / flash and acoustic * Built-in power pack with cable for connection to the 230 V network (2 m) * Pluggable connection to the telephone network via TAE connection cable (3 m) * Housing color: white