... With LED Display we are mini speaker factory2013 Digtal Mini Airplane Speakers 2013 Digtal Mini Plane Speaker for USB sd ac dc 1 ... shape mini speakerSupport USB and TF card.With FM Radio.With LED display.Compatible with Mobile,MP3, MP4, Computer/ Notebook and other kinds of Audio ... : Horn specification: 4 Ω, 3w, L250 × W170 × H70mm, the system frequency response: 150 hz ~ 18 KHZ, THD: 1% (1 W ...