Full-range vibration speaker. It's a hidden sound transducer that transmits acoustical energy through almost any solid plate.
It's a full-range vibration speaker that works with rigid surfaces that include glass, drywall, granite, metal, wood, ceramics, laminates and composites. High-quality, full-range, hidden sound is radiated from the entire surface.
Dimensions: 41*27 mm
Impedance: 4 ohms
Power: 5W RMS
Usable frequency (depending on substrate): 60-20KHz.