Product Name: Double Parabola Rounded Crest Directional Loudspeaker Model NO.: PV-30 THD: <0.005% Monitor: Without Screen Certification: CE, RoHS, FCC Application: Museum/Exhibition/Supermarket Speaker Material: Plastic Speaker System: Mono Operation Mode: Wire / Remote Control Activity: Passive Hi-Fi: Not Hi-Fi Noise: <95dB Material: Plastic Trademark: Lisen Echo Transport Package: Wooden Package Specification: 760 diameter Origin: China Product Description Double Parabola Rounded Crest Directional LoudspeakerFeatures:*The most legible sound*The colors and areas can be customized.*Provides full-frequency radiation and strong bass voice *Fully applied in multi-sound areas and public broadcasting system*The Zero reflection of Patent and cabinet technology has the upstage tone.*The Dual-Parabolic of Patent technology has the maximization sound focusing.*Lisen Double Parabola Rounded Crest Loudspeaker 20/30 dia, dome, 5.25 two-frequency division, single track *Can be fixed in ceiling, wall, and other conditions with single-point installation.*Double Parabola Rounded Crest Loudspeakers are clean and bright with security and damage proof can be used in many kinds of situation.Product details&Applications: