The SDSPKR3 Solid State Transducer Speaker (masking only) enables sound masking to be distributed uniformly throughout the space, without the visibility of a standard speaker. A truly hidden speaker, the SDSPKR3 installs directly on walls and ceilings. The unit turns an entire structure’s surface into a high-quality sound source while remaining completely hidden from view. In fact, the SDSPKR3 can generate sound by utilizing only 5 to 20 watts. This speaker is thermally protected, so it can also be used in high-output applications.