Philips SBA1600 Portable Speaker System, 2 W, 4 Ω, 350 - 16000 Hz, Silver, AAA, R6, 1.5 V Philips SBA1600 Portable Speaker System. RMS rated power: 2 W, Impedance: 4 Ω, Frequency range: 350 - 16000 Hz. Product colour: Silver. Battery type: AAA, R6, Battery voltage: 1.5 V, Battery life (max): 40 h. Width: 150 mm, Depth: 30.4 mm, Height: 95 mm. Master (outer) case width: 232 mm, Master (outer) case length: 432 mm, Master (outer) case height: 207 mm