... 3 LED screnn 4 Support SD/USB, with FM computer speaker Model: Q3Image Key Specification 1, ... S/N ≥75db6,input power DC 9V7,li-on battery 7.4V 2000mAh/rechargeable8,support U flash disk ... ,TF card,Suitable for devices equipped with a 3.5mm audio jack, including cell phones ... contact with me.Thanks very much for you time.Any enqury, please let me know. Portable Megaphone with MP3, ...