Speaker unit:4o3w*2+diaphragm Response frequency:70hz-18khz Response rate:60db±2db S/n ration:=80db Distortion:=0.5% Distance:barrier-free10m Input:dc5v 2a Transmission power: 5w output (qi charging):5v 1a Transmission distance:5mm Efficiency:=72% Battery : 5000mah battery built-in product size:138*69*130mm *bluetooth speaker *micro sd card *line-in *led display *fm radio *alarm clock *wireless charger *speakerphone *bluetooth 3.0: tf card reader, bluetooth, aux, fm, clock, alarm clock, speakerphone, *all touch buttons, smart, convenient, high-grade and efficient *strong bass, can be made customized according to customer's demand for sound quality *devices supported: mobile phones, tablets, laptops, etc. *cortical or crystal appearance, classic, high-end, individuation * support alarm setting and other other personalized functions *wireless charging power bank with 5000 mah battery built in "built-in charg coil"