... frequency High power Low noise Horn – Perfect Tone quality Present7.USB Audio OutputInstructions for useWill be Connecting line PC to Horn ... ,The other to Computer or mp3the USB and AC Audio PackingCarton Alone Packing,Contain Accessories:Horn 1PCS ... ,Manual 1PCS.Features:1,Full beer case printing ,full color 2,mini portable design use for computer,mp3,all audio3,When using ...