... Sound Quality * Certified by BQB, CE,FCC... Outdoor Stereo Bluetooth Speakers with MIC Q3, Build- in Battery, Line-in FunctionSpecification:1.Wireless ... .Input Sensitivity:300mv5.S/N:75dB6.Frequency response:80-18KHZ7.Speaker:40mm*1,4Ω,3W8.Output jack: 3.5mm stereo 9 ... Per 20'' FT 40''FT MOQ1000 pcs Q3 Stylish Bluetooth Speakers, Portable Speakers with MIC