- Suttle loud indoor/outdoor bell - Modular bells and ringers are ideal for factories, farms, offices or any location where an audible signaling device is needed - Contains a modular jack that accepts line cords for plug-in installation and is available in single-line only - 45-130 VAC Ringing Voltage - 90dB - Mechanical ringer - Modular hook-up - Heavy duty - Two 4" bells - Ringer equivalency 1.0 - 1 year manufacturer's warranty