Strong Bass: The horn is all frequency effect, the bass is very strong, frequency response is 20HZ -- 20KHZ (kHz), the equivalent of traditional loudspeaker 8 inch bass effect. | 360° Frequency Transmission: The vibration speaker has the latest innovation, breaking through the limitations of the traditional, can transmit 360 ° frequency. | Clear Audio: Since there is no body standing wave, so all kinds of vocal music original, the sound quality of each sound frequency range is very clear. | Compact Size: The sound penetration of this resonance speaker is strong, small size and convenient to use. | Wide Application: This resonance speaker is suitable for computer, laptop, MP3, MP4, CD, mobile phone and other equipment sound playback and sound expand.

Convenient to Operate: A band-pass filter is a device that allows a particular frequency band to block other frequencies simultaneously.It is convenient to operate. | Reliable Performance: The high pass filter has the characteristics of low insertion loss, high resistance band rejection and high image attenuation, high power tolerance, low cost and miniaturization. | Convenient Debugging: Convenient debugging, the band-pass filter has good selectivity and stability. | High Reliability: The filter with high reliability, stable and reliable working performance. | Professional Made: The band-pass filter is compliant with standards, produced in accordance with standards