- Valcom paging horn- 15 Watt- One way- Easy Omni-Lock I-Beam clamp mounting system- Weather resistant- Indoor/outdoor- Built-in amplifier- Built-in volume control- Stainless steel hardware- 360* rotation- Shatter-proof base fits seven standard electrical gang boxes- Beige- Weight:4.6lbs- Dimensions: 7.38"H x 10"W x 10.4"D- VALCOM POWER UNITS (-18)VCV1036C