Features Work Parameters: The Single Cavity Speaker Has A Rated Power of 3w, An Impedance of 8ω, And A Frequency Response Range of 500hz‑10khz. Standard Interface: The Cavity Speaker Is Equipped With Ph2.5mm‑2 Pin Interface to Ensure Stable Connection And Quick Response, Efficient And Practical.. Magnetic Speaker: Adopting A High End Built in Magnetic Speaker, Which Ensures Stable Performance, Clear Sound, And Provides Long-Term Operation. Applicable Range: Widely Used for Facial Recognition And Payment, All in One Machine, Advertising Machine, Laptop, Video Phone, Portable Dvd, Smart Clock, Etc. Specifications: This Kit Includes 4pcs Round Full Range Cavity Speakers, with Compact Size, Easy to Install And Connect, Have A Wide Range of Applications. Specification: Item Type: Mini Speaker Material: ABS Model: W1008 Rated Power: 2W Impedance: 8Ω Resonant Frequency: 450±20% Output Sound Pressure: 88±3dB Frequency Response: 0-20kHz Maximum Distortion: 10% Storage Temperature: -20℃ to 55℃ Working Temperature: -20℃ to 55℃ Package List: 4 x Mini Speaker Package List Item Type: Mini Speaker Material: ABS Model: W1008 Rated Power: 2W Impedance: 8Ω Resonant Frequency: 450±20% Output Sound Pressure: 88±3dB Frequency Response: 0-20kHz Maximum Distortion: 10% Storage Temperature: -20℃ to 55℃ Working Temperature: -20℃ to 55℃