- Marine paging horn- Talkback (requires V-9941A to operate)- Easy Omni-Lock I-Beam clamp mounting system- Weather resistant-Interior/exterior- Built-in amplifier- Built-in volume control- Non-yellowing perfect forshipboard and marinas- Stainless steel hardware- Resists deterioration by salt sun or high humidity- Equipped with O-ring seals- 360* rotation- Shatter-proof base fits seven standardelectrical gang boxes- White- Weight: 4.5lbs- Dimensions: 7.38 H x 10 W x 10.4 D- VALCOM POWER UNITS (0)