The AS-901-CWSV+AS-901-WSM is an Series-900 intelligent analogue addressable Wall Sounder Beacon that combines wall sounder beacon and addressable interface module. The Sounder beacon is for indoor use and is equipped with 4 recognized tones which can be the locally at the sounder, using DIL Switches 1 & 2. The addressable wall sounder beacon is part of Series-900 Intelligent Analog Addressable Fire Detection and Alarm System