... 3.FM,Clock,alarm SU-22 mini speaker with built in amplifier FM,clock,alarm Description:1.Mini speaker ... built in amplifier support any MP3 music from SD/MMC ... 5.Impedance:4Ω6.3.5mm Stereo Audio Jack7.Built-in 500MAH rechargeable Li-ion battery8.Rechargeable time:2- ... 078 PCS40HQ18,310 PCSImage: SU-22 mini speaker with built in amplifier FM,clock,alarm