1 portable loudspeaker 2 with FM TF USB function 3 loud voice ,2000 ... , output RMS 40W x 13,response frequency 100HZ-18KHZ 4, speaker unit Φ40mmx2/4Ω 5,S/N ≥75db6,input power DC ... with meOEM and OED order is welcome!Thanks! Daile amplified speaker