LogiLink SP0018. RMS rated power: 2 W, Frequency range: 100 - 18000 Hz, Impedance: 4 Ом. Headphone connectivity: 3.5 mm. Battery technology: Lithium-Ion (Li-Ion), Battery type: AAA, Power source type: USB. Cables included: USB. Packaging width: 72 mm, Packaging height: 128 mm