V-1030C is manufactured by Valcom and works with Panasonic Phone Systems. V-1030C Features: 5-Watt Amplified Horn, Built-in Volume Control -116dB Measured at 4' (1.22) on Axis w/ a -10dBm Input at 1kHz, Amplifier Module -Rated Output: 5 Watts RMS -Output Load: 8 Ohms - Input Impedance: 600Ohms (1kHz at Rated Output) -Operating Current 300mA at -24Vdc, Frequency Response: 225Hz to 14kHz, 120° Horizontal & 90° Vertical, High Impact ABS Housing -Base is Constructed of Ultra-high Impact LEXAN® Plastic, Omni-directional Mounting Base, Wall or Electrical Box Mount, Operates on 24 VDC Power Supply, Indoor / Outdoor Use, I-Beam Clamp Included"