SECO-LARM’s SH-816S-BQ and SH-816S-SQ feature a strobe light that can be triggered separately from the siren, a 25W speaker, audio input for broadcasting messages or audio playback, a 120dB warble-tone siren, a bright xenon tube strobe light (SH-816S-SQ), 9~15 VDC operating voltage and built-in tamper output. They are IP65 weatherproof for outdoor/indoor use, and they mount directly to a wall or to most common back boxes. Sirens/strobes are available with amber, blue, clear and red lenses.