Ecophone is a passive marble amplifier crafted in Italy with great care for its design, sound quality and price/quality ratio. Crafted from a single block of "marble of Carrara" its refined conical structure and firmness make Ecophone a unique product. It is 3,5 inches tall, 6,2 inches long and 5,5 inches wide with a great deal on its weight (only 6,6 pounds). It can nullify sound distortion (thanks to the marble) and can quadruple its acoustic power output. Ecophone utilizes the sounding box principle, amplifying and redirecting the sound output coming from the smartphone without any electricity consumption, playing accurately and naturally mid and high tones. It doesn't require wires nor any elements different from it's marble structure which develops an incredible surround effect and an "immersive" listening experience overall. It fits with any type of smartphone with external loudspeakers on the lower part (speakers must be distant not more than 2 inches from the smarphone base). Artisan crafted and customizable with logos or any incision. Each Ecophone is unique, his distinguished and elegant design and structure allow to use it as a speakerphone amplification tool allowing on the same time to use the smartphone display.