Product Name: Active Fashion Speaker (BS-40A, BS-50A, BS-60A) Model NO.: BS-40A, BS-50A, BS-60A Style: Head-mounted Transducer Principle: Piezoceramics Speaker Cone: Paper Cone Transmission Mode: Air-conduction Category: Speaker Origin: China HS Code: 8518220000 Product Description Feature:RCA InputMaster, Bass, Treble Level AC FuseShort ciruit protectionOverload protectionDC Voltage protectionThermal protectionTechnical Specifications:BS-40ARated taps: 20WLive voltage: 220V ACSensitivity(1m, 1W): 88± 3dBFrequency response: 100~20KDimension(mm): 162*181*170Material: ABSWeight(kg): 1.7Speaker unit: 1"+4" coaxialBS-50ARated taps: 30WLive voltage: 220V ACSensitivity(1m, 1W): 88± 3dBFrequency response: 80~20KDimension(mm): 186*205*203Material: ABSWeight(kg): 2.05Speaker unit: 1"+5.25" coaxialBS-60ARated taps: 40WLive voltage: 220V ACSensitivity(1m, 1W): 89± 3dBFrequency response: 80~20KDimension(mm): 216*234*213Material: ABSWeight(kg): 2.65Speaker unit: 1"+6.5" coaxial