The OMNITRONIC HSO-50 is a weather-proof horn speaker for 100 V public-address systems, with selectable 25 W or 50 W RMS power tapping. It uses a 1.5-inch horn driver and provides a frequency range of 380 to 6500 Hz with 109 dB sensitivity. The speaker has a durable white plastic oval enclosure, IP44 protection and an included mounting bracket. It is intended for outdoor installations including football stadiums, outdoor pools and open-air events.