link 1.0 Djem Guerreru Inc. https://www.djemguerreru.com 21600 JOITO's https://www.joitos.com https://cdn.joitos.com/GENERAL/12/124/1246/12463086.V0.jpg 400 250 https://www.joitos.com/item/28941833/One%2DWay%2DClean%2DRoom%2DSpeaker - Designed for applications where concentration of airborne particles is controlled, such as pharmaceutical, medical, and other critical manufacturing environments.- Large rubber o-ring to seal the grille to the ceiling- Rubber washers for all mounting hardware- Apolycarbonate dust shield located between the speaker and the grille- Built-in amplifier- Capable of reproducing voice paging in clean room environments- Screwdriver adjustable volume control located on the 1 watt amplifier circuit board- 8-inch speaker 209.48 USD 0 Electronics & computer--Accessories--Installation & warranty