The AtlasIED VTB-4 is a 15W, environment-resistant voice/tone compression driver featuring a 25V transformer. Ideal for communications, intercoms, electronic alarms, and monitoring systems, it offers high efficiency for clear audio intelligibility. Its durable metal die-cast body includes an integral exponential horn, built to withstand temperatures from -30° F to 150° F. This patented speaker suits high-efficiency industrial applications and comes in five model options with different wattages, impedances, and transformers. UL-recognized and certified, it resists water, moisture, corrosion, dust, vibration, and vermin. Enhance your audio setup with this reliable, safety-listed component today!