4" Active speaker. Inalambrica V5.0 connection. Scope: 10m. Power: 5W. Rechargeable battery of 1200mAh, 12V. Connection: USB (up to 16Gb), SD card (up to 16Gb) and Aux 3.5mm. FM radio. Frequency response: 20Hz - 20KHz. Related signal noise: 80dB. Sensitivity: 100dB. Food: Bi-volt V ~ 50/60Hz. Charge via micro USB. Includes: USB charging cable, 3.5mm Aux cable. Dimensions: cm.