LogiLink SP0012. RMS rated power: 2.5 W, Frequency range: 100 - 20000 Hz, Impedance: 4 Ом. Headphone connectivity: 3.5 mm. Diameter: 36 mm. Battery technology: Lithium-Ion (Li-Ion), Battery voltage: 3.7 V, Battery type: AAA. Cables included: 1 x 3.5mm 1 x USB 1 x DC 3.5mm M/F 0.2m 1 x DC 3.5mm F/Nokia 0.2m