Rated Power:2.3W×2 Frequency Response :100Hz~20KHz Driver unit :4Ω 2W×4 S/N Ratio :85dB Input Sensitivity:500mv products size Diameter: 150*45mm weight 290g excluding battery power supply AC/DC Adapter: input: 100~240V±15%,output: DC5V / 1A Sound box system 1PCS Power source adapter 1PCS Audio signal wire 1PCS Velvet pouch 1PCS User manual 1 PCS USB-DC 1PCS