... speaker for mp3 phone 1.clear alt&pure woof 2.Connect usb,tf card,phone,computer,mp3 3.LCD screen&FM mini speaker for ... mp3New mini aluminum vibration film loud speaker,which ... ordinary,with many colours,several solution,for your option.several power supply manners ... 3WFrequency response:150-18000Hz(3dB)SNR:≥80dBALoud speaker: 1.77”(OD 45mm),magnetless,4Ω ...