Communication : Audio LineBattery : NoSpeaker Type : SubwooferPower Source : ACNumber of Loudspeaker Enclosure : 1Certification : NONECabinet Material : MetalAudio Crossover : Full-RangeChannels : 2 (2.0)Input Power(W) : <25 WIntelligent Personal Assistant : NONESensivity : 87dBRated Power : 40W,100W,4Ohm 8OhmFrequency : 51Hz-5.5KHzSensitivity : 87dbEquivalent Volume : 6.8LQTS : 0.55Feature 1 : woofer speakerFeature 2 : woofer speakerFeature 3 : woofer speakerFeature 4 : Replacement partFeature 5 : speaker accessory kitBass speaker Subwoofer 100W 4 Inch Subwoofer Speaker 4Ohm 8Ohm 4 Layer Voice Coil Bass Speaker For Car Audio Home Theater DIY 1PcDescription:1.With waterproof function2.High frequency can be extended to 5.5Khz, can be upgraded to 2.0 computer speakers3.Dual magnetic anti-magnetic design, strong anti-interference4.The bass is clear, strong and fastFeature:Rated Power:40WPeak Power:100WImpedance:4Ω/8ΩFrequency:51Hz-5.5KHzSensitivity:87dbEquivalent Volume:6.8LQTS:0.55Square Type Size:Φ106mm*H68mmCircular Type Size:Φ118mm*68mmMore details size,please check the picture.The Price is for 1 piece speakersIf you are satisfied with the items and service.please leave us 5 star review with nice pictures.we will be very appreciated it.If you have any problem ,pls contact us before leaving us a negative feedback ,we will try our best to solve the problem and will be ensure make you have an good shopping experience.Thank you very much.