Product Name: SL-Vs01 4ohm 10-25W Transducer Vibration Speaker Driver 50mm Model NO.: SL-VS01 Brand: Recon WORD nChannels: 2.1Channel Usage: Accept Radiation Mode: Indirect Radiation Type Style: Portable Transducer Principle: Electrostatic Earphone Cone: Rubber-edge Transmission Mode: Bone Conduction Category: Speaker Output Power: 4ohm 20W Trademark: recon Transport Package: Carton Specification: 20W Origin: China Product Description Our Model No.SL-VS014Ω10-25W 4FB CProduct Model No:1Applicable Scope1.1TypeResonance speaker1.2Dimensions50 mm 1.3PowerNominal input 15 W, Maximum input 25W2mechanical specification2.1magnetmagnetSize:25*3.5 N40Size:25*3.5 N40Material:2.2Total Weight0.5kg3 Electrical specification3.1 Nominal Impedance4Ω±15% test @200Hz1 v3.2 Lowest Resonance Frequency58Hz±20%(@1.0 V)3.3Output sound Pressure Level85±3 dB(100,400,800,12000Hz medium value@ 1m 10w)3.4 Effective Frequency BandFo~ 20KHz ( averagesensitivityfall10dB)@2.0V 10 W3.5Distortion5% less @ 5W 1000Hz 3.6Sine Wave Test9V 60~2.0K HZMust be normal at sine wave3.74.1 Load Test Must be normal after load test :pink noise 10W 48 hourspacking details: