Features: This filter has low in-band insertion loss and steep cut-off characteristics. It is specially used for performance optimization of 403MHz receiving equipment, which can effectively filter out 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 ability for out-of-band remote signals, and its performance is far superior to products made with bare PCB boards; Using aluminum alloy shielding for shell, anti-interference, no out-of-band spurious response, Small, sturdy and easy to use. Center Frequency: 403 MHz 1dB Passband: 401 to 405 MHz Specifications: Material:Metal Model: FBP-403s Impedance: 50 Ohms Center Frequency: 403 MHz 1dB Passband: 401 to 405 MHz Insertion Loss: < 2.5db @401 ~ 405 MHz Maximum Carrying Power: 100mW (20 dBm) Product Size 34.5x18x10mm Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: Package A:(A/B Optional) 1x 403s Saw Bandpass Filter 1x Adapter Package B: 1x 403s Saw Bandpass Filter 1x Adapter 1x Cable