The Hochiki YBO-BSB2(WHT)/WL is an EN54-23 compliant, addressable loop-powered base sounder beacon with white LEDs, offering adjustable sound output from 50 to 98 dB(A) and a 0.5 Hz or 1 Hz flash frequency. Designed for easy integration with the Hochiki Standard or Isolator Base, it supports ESP sensors, beacons, and remote indicators. The unit features 51 user-selectable tones, an auto-shutdown function to reduce noise pollution, and the ability to operate the sounder and beacon independently. With an IP21 rating, it's suitable for indoor use, and can be converted to a wall-mounted unit with the addition of a cap. Available in white, ivory, or black, it provides versatile signaling for fire alarm and emergency notification systems.