Inspired by one of the first acoustic devices, this smartphone amplifier is the result of a unique Wooden Amsterdam X Acousticbox collaboration. With both retro and designer styling, the base of this hearing aid is made from walnut wood. Place your Smartphone in the slot that is suitable for it, and enjoy hearing the amplified sound of your favorite music. Compatible with any type of smartphone whose sound output is located at the bottom of the phone. Choose your amplifier among our superior quality woods (Rosewood, Walnut, Maple).