This vintage Merit TV-151 Permeability Tuned Television Sound Trap is a must-have for any collector of radio, phonograph, TV, or phone parts and tubes. Made in the United States, this sound trap features a 4.5mHz frequency and was manufactured by Merit equivalent to the model number Miller 1470. It is in excellent working condition and has been tested to ensure the highest quality performance. This rare piece is perfect for any enthusiast or collector looking to add to their collection.