UAF42 has the following features:Highly versatile, can be changed as high pass, low pass, band pass and band stop filters as needed (Jumper settings);The design is simple. BB has also designed a software specifically for the UAF42, which makes it easy and flexible to design different types of filters.With high precision frequency and high Q value;On-chip integrates 1000pF 5% of the capacitor.Module Features:1. Use 5 to 18V power supply anti-power reverse circuit to prevent the power supply from accidentally burning the board2. Cutoff frequency, center frequency and gain adjustable, Q value adjustable3. Input can be connected in phase or in reverse.4. Output through the jumper cap strobe output bandpass, low pass, high pass or filtered to amplifyPackage includes:1 x General Filter