The KAC Intelligent Integrated Detector Base Sounder is compatible with the latest advanced protocol. This allows 159 output devices on one intelligent loop. The base has been produced to reduce the installation cost. The product performance had been optimised to allow a maximum permissible number of devices to be installed on an intelligent loop. The KAC Integrated Detector Base Sounder is supplied with 32 tones and high, medium and low volume settings, which are selectable by DIL switches. A version of the Integrated Detector Base Sounder with inbuilt isolation is also available.