JVC RA-P1, 4 W, R6/AA (UM-3), 1.5 V, 120 V, 60 Hz, 350 g JVC RA-P1. RMS rated power: 4 W. Battery type: R6/AA (UM-3), Battery voltage: 1.5 V, AC input voltage: 120 V. Weight: 350 g. Compatible products: iPod iPhone 3GS, Dimensions (WxDxH): 240 x 81 x 58 mm