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Speaker function 1) support: TF card, USB, FM, line in & line out, clock 2) play music from mobile/MP3/MP4/MP5/PC/laptop/iPhone/iPod 3) FM radio function: High sensitivity radio with internal & external double antenna 4) crystal acrylic Mini speaker with colorful flashing LED light 5) LED screen can display: time, FM channel, charging status 6) Material: crystal acrylic and aluminum alloy 7) speaker Size: 50x50x52mm 8) stereo earphones, earphone jack 3.5mm 9) line in, line out and 3.5mm earphone jack 10) colors: silver, Black, Rose, red, blue, green 11) built-in rechargeable lithium battery 300-350mah enough power 12) play time: 2-4hours 13) accessories: USB cable, Audio line. String, user manual you can turn off the LED light, if you don't need it. speaker specification output power: 3w*1 rated impedance: 4¦¸ supply voltage: 5V frequency response: 150hz-20khz SNR: ¡ý80db double magnetic trumpet: 16 core*1 16 core*1 3.5mm line in battery: 300-350mah enough distortion: 0.3% support: MP3/WMA format music internal battery speaker accessories 1x USB cable 1x audio line 1x string 1x User Manual 1x blister packing