... megaphone 3 LED screnn 4 Support SD/USB, with FM computer speaker Model: Q3Image Key Specification 1, material plastic2 ... 40W x 13,response frequency 100HZ-18KHZ 4, speaker unit Φ40mmx2/4Ω 5,S/N ≥75db6, ... flash disk,TF card,Suitable for devices equipped with a 3.5mm audio jack, including cell ... with me.Thanks very much for you time.Any enqury, please let me know. Portable Megaphone with MP3,FM,SD ,USB ...