... , MP4 2)power amplifier, electronic sound volume, Fashion mini IPHONE speaker(JYD-668) Applicable ipod the broadcast and chargingApply ... , MP4 broadcastApply to handheld game, learning machine broadcastApply to CD, VCD, DVD broadcastFunctions:1. The active power amplifier, electronic ... music phone charging, music play function4. MP3, MP4, CD computer music playingProperties:Power 1.5 W * 4Voltage 9 V ...