... volume control, and LED indicator light;strong bass is good; the real dimension of sound ;DIY music,different material,different feeling ... amplifier. It will let you enjoy different music effect when the box set on different medium,such as wood, block ,glass, wall ... phone etc7. Product size: 91x91x60mm, Net weight: 580g8. Packing: Gift box New BASS Vibration speaker(HI- T)