Phantom Sound: The 46-inch F5M5 features a concealed speaker system in which the horn is installed in the open space at the bottom and rear of the TV set and sound is emitted through the openings of the bezel and reflected by a sound mirror. As an innovation compared with conventional TV sets, the proposed hidden speaker was developed and adopted after careful review of the possibilities by the sound engineer. Curiosity about the sound coming from an invisible speaker renders a sense of mystery to the product. Mystic Interface: The power button and function buttons become invisible when they are not in use. The power button and LED at the center as well as the function buttons on the right are only lit when in operation.