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The EST G1R-HDVM is a horn/strobe manufactured by EST. It is part of the Genesis series, and this particular model is red, wall mounted and has no FIRE marking. It is the most common in Alberta, seen in lots of places. This horn/strobe is known for its small size (about the size of a playing card), and their very loud and distinctive alarm sound. This model was introduced around 2004-05, and is still in production.
Specifications
Loudness: 101 dB on high volume, 97 dB on low (though it can get to a whopping 106 dB on 33V FWR!)
Strobe Intensity: 15, 30, 75 or 110cd
Voltage: 16-33VDC or FWR
Type: Electronic horn/strobe