Comus-G3SB002-Grade-3-Alarm-Dual-Tone-High-Low-Sounder-110d B-12V-DC-16-Ohm-Comus-G3SB002-A-16-Omega-dual-tone-high-low-sounder-for-alarm-systems-the-two-tones-are-independently-triggered-&-the-strong-Mylar-cone-enables-the-alarm-&-exit-tones-to-emit-110d B-&-80d B-1m-respectively-Additional-features-include-an-anti-tamper-switch-for-added-security-&-a-weather-resistant-white-polycarbonate-housing-that-allows-the-speaker-to-be-mounted-outside-or-in-harsh-environments-Comus-G3SB002-A