Valcom V-9945A Loud Ringer Horn<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Interrupted or uninterrupted contact closure activation </span></li><li><span class="a-list-item"> Built-in tone generator speaker and volume control </span></li><li><span class="a-list-item"> Warble tone - night ring </span></li><li><span class="a-list-item"> Single tone - time clock / doorbell / alarm </span></li><li><span class="a-list-item"> Single tone overrides warble tone if activate simultaneously </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41qYAcGpnrL.jpg" noproxy>