... external battery slot 3.FM,Clock,alarm SU-22 mini speaker with built in amplifier FM,clock,alarm Description:1.Mini speaker built in amplifier ... /USB 2.Perfect speaker for your cell phone,MP3,MP4,IPOD,IPONE,laptop and all audio devices 3.Wooden portable boombox design ... .5KGS20GP7,539 PCS40GP15,078 PCS40HQ18,310 PCSImage: SU-22 mini speaker with built in amplifier FM,clock,alarm