P-TEC Voice Paging Speakers are suitable for voice paging as well as background music. The V-5330200 is a 70 Volt model with adjustable taps and volume control. The V-5330100 is a voice coil (45 Ohm) 3.4 Volt model with volume control. P-TEC speakers consist of a 3.6 inch cone speaker mounted in a unique surface-mount baffle. The baffle is designed for mounting on acoustic tile, such as those normally found in suspendedceilings; and can be mounted without cutting large holes in the tile. The mounting pins can be removed for mounting in a hard ceiling. The speaker housing has screw holes for securing speaker without mounting pins. Although the P-TEC speakers are designed especially for standard suspended ceilings, they can be used on many types of ceiling materials.