YBO-BSB2/RL Base Sounder Beacon - Ivory case, Red LEDsYBO BSB2 RL Base Sounder Beacon Ivory case, red LEDs Manufactured by Hochiki, this Hochiki YBO BSB2 RL Base Sounder Beacon Ivory Case, Red LEDs is an O Rated EN54 23 compliant addressable loop powered Base Sounder with integral Beacon, innovatively designed to give a range of tones and volumes with a maximum output of up to 98 dB(A) (2 dB(A)) with low current consumption. The unit is designed to fit to the Standard Base (YBN R 3) or the Isolator Base