speaker support Usb-disk,SD card 3.5mm audio cable.FM size ... 70*38mm external LI battery,500mAh/DC 5v 1.5"speaker,3W*2 the functions and the advantages of our ... mini speaker1,it can play music automatic by the support of the following device:A,memory card,such as ... parameter: Output power: 5W(2.5w+2,5w)Loud speaker specification:1.5cm ,4ouhm,3wfrequency response:1000hz-20khzsound&noise rate ...