... your mobile phone then you can hear the sound power Amp. For example: the iPhone 4s bottom and the speaker ... Available Date-Expired Date CE ATC ATE20121332 Music Power, MP-01, MP-02, MP-03, MP-04, MP-05, MP-06, MP ... 28 --- 2049/12/31 RoHS ATC DGC12061920S Music Power, MP-01, MP-02, MP-03, MP-04, MP-05, MP-06, ... 29 --- 2049/12/31 FCC ATC ATE20121333 Music Power, MP-01, MP-02, MP-03, MP-04, MP-05, MP-06, ...