... 3 LED screnn 4 Support SD/USB, with FM computer speaker Model: Q3Image Key Specification 1, material plastic2, output ... RMS 40W x 13,response frequency 100HZ-18KHZ 4, speaker unit Φ40mmx2/4Ω 5,S/N ≥75db6,input power ... DC 9V7,li-on battery 7.4V 2000mAh/rechargeable8,support U flash disk,TF ... you time.Any enqury, please let me know. Portable Megaphone with MP3,FM,SD ,USB flash