System Sensor B200S-LF-WH Intelligent Addressable Sounder Base 29/01 The versions with two optical

The versions with two optical sensors (dual‑optical) detect the lightest smoke

dorm rooms

The base does not require a separate address because it shares the address of the device it is connected to

The LC-151 and LC-171 are dual technology motion detectors that combine passive infrared and microwave detection with pet immunity

System Sensor B200S-LF-WH Intelligent Addressable Sounder Base 29/01 The versions with two opticalThe B200S LF WH and B200S LF IV sounder bases are used with addressable detector heads. Refer to the appropriate manual for more information on sensors. The B200S LF WH B200S LF IV low frequency sounder base generates a low frequency tone around 520 Hz. Studies have shown that low frequency audible devices that operate around 520 Hz are more effective in waking individuals in sleeping areas. The sounder base is capable of producing a variety of tone