Feature:1. Pretty Sounds: The single directional resonance speaker with low harmonic distortion and 85dB signal to noise ratio has high sound quality.2. Flexible Using: Widely applied to sound playback and amplification on computers, laptops, MP3, MP4, CDs, mobile phones and other devices.3. Full Frequency: Full frequency range, with very clear sound quality in each frequency range, so you can better enjoy the music and melody.4. With Strong Bass: The bass is very strong, and the bass effect of this internal magnetic resonance speaker is equivalent to an 8in speaker.5. Quick to Install: Comes with a compact size and a light weight as well, the resonance speaker is very convenient to install in minutes.Specification:Item Type: Resonance SpeakerMagnetic Circuit Form: Internal Magnetic TypeSensitivity: 84dB or WRated Power: 3WSignal to Noise Ratio: 85dBHarmonic Distortion: 4TMD percent Diaphragm Material: Non Paper MaterialFrequency Features: Full frequency band, full range.Directionality: Single Directional.Package List:1 x Resonance Speaker