... SB/SD Micro Music System with FM radio MPEG-2,MPEG-2.5,code rate 8-448kbssupport both MP3 and WMA( ... supply: DC 5VTriangle orientation low frequency passive radiator designRMS: 3W*2, S/N= 90dB when 1W 4 OhmTriangle orientation low ... detection function, inserts earphones, system can automatically shutdown the loudspeaker amplifier circuit, more electricity energy saving Clock, alarm clock, timing play ...