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Check the listing for details. 2.4G 2450MHz Bandpass Filter SMA Interface Bandpass Filter Module Accesory------. Condition: New. Listed at 36.99 USD. Stable : Bandpass filter can adjust of different amplitudes, phases, and frequencies, avoiding distortion or adjusting phases, thereby improving quality. Using: Bandpass filters can reduce noise and interference, thereby improving the to noise ratio of the and the reliability and stability of the system.