With various tones and adjustable volume outputs, VELOX sirens can be used in many different environments. Different tone options can be adjusted according to alarm and evacuation signals. For applications such as BS Fire tone, DIN tone and Dutch fire tone, tones can be selected from the fire alarm control panel and programmed for different situations with different timings. The volume adjustment button on the back of the units allows adjustment of the volume of the tones according to different conditions and applications. These devices are operated from the same fire detection loop, which provides connection to system devices such as fire alarm control panels, detectors, elevators, buttons. For this reason no external power supply is required. Features: • LPCB EN54-3: 2000 A1: 2002, A2: 2006 EN54-17: 2005 certified • Internal short-circuit isolator • Automatic and manual addressing feature • 1 mt.de 100 dB s output • Panel programmable tones • Selectable blink rate and light output value