What it is. Concert-quality sound in solid concrete and walnut. The rock enhances depth and bass, and harmonic wood adds clarity to midrange and treble. Controls with hand movement over the sensor. Bluetooth-only. Power: 100-240 AC 50-60 Hz. Frequency: 85Hz-20kHz. Made in Italy. Concrete/Walnut. 10 x 7 ½ x 5 ½”.