Features: The filter has low interpolation loss and steep cut-off characteristics. It is optimized for the performance of 1900MHz for image transmission (flight mode) receiving equipment, which can effectively filter out out-of-band signals, reduce noise, and increase the dynamic range. The inside of this product is an ultra-thin PCB board, which still has excellent suppression capability to the remote out-of-band signal, and the performance is much better than that of the pure PCB board. The aluminum alloy shielded shell is used for anti-interference and no false response outside the band. Small and sturdy, easy to use. Specifications: Material: Metal Weight: 10g Size: 34x17.5mm/1.33x0.68inch Model: FBP-1900 Impedance: 50 Ohm Center Frequency: 881.5 MHz Passband: 868 ~ 895 MHz Insertion Loss: 2.0 ~ 2.5 dB Maximum Load Power: 100 mW (20dBm) Interface: SMA-M, SMA-F Note: 1.Please allow 1-2cm error due to manual measurement, please make sure you don't mind before ordering. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.