This filter has low in-band insertion loss and steep cutoff characteristics. It is dedicated to the performance optimization of 403MHz receiving equipment. It can effectively filter out-of-band signals, reduce noise, and increase dynamic range. The inside of this product is an ultra-thin PCB board, which still has excellent suppression of out-of-band remote signals, and its performance is far products made with bare PCB boards Use aluminum alloy shielded shell, anti-interference, no out-of-band spurious response, compact and sturdy, easy to use. Insertion loss: less than 2.5dB @401 ~ 405 MHz Maximum carrying power: 100mW (20 dBm) Model: FBP-403s Impedance: 50 Ohms Center frequency: 403 MHz 1dB passband: 401 ~ 405 MHz Colour: silver + gold Material: metal Size: 34.5 x 18 x 10mm Package Contents: 1 x Bandpass Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.