CUL-01 Ultrasonic Speaker has 33 ultrasonic emitters to avoid unauthorized cell phones to record crucial and confidential information during meetings. It has unattractive appearance and is suitable to be placed in a room or can be portable to work because of its built-in battery inside. The best interfering microphone performance when CUL-01 emitters exactly face a phone speaker because the emitters affects the microphone directionally. Specification Ultrasonic emitters:33 pcs Dimension: 315mm 57mm 55mm Operation time with built-in battery:2.5hrs Remote control to turn on /off the device
Advantages of the Ultrasonic Directional Speaker: 1. Strong Directionality: Achieves the best voice control point and maximum reduction in noise pollution. 2. Easy Installation: Can be installed at any angle. Ultrasonic waves are only a few millimeters in length. They are much smaller than traditional speakers and can produce a narrow, nearly linear beam of sound. Ultrasonic wave directional loudspeakers can travel through the air like a flashlight beam, controlling the sound in a particular area. Sound can be enhanced in a specific area and diminished everywhere else. Z
