Optimal frequency filtering: This bandpass filter is designed for 403 MHz applications, filtering out interfering frequencies, effectively isolating and enhancing signal transmission Suitable for a variety of RF applications, ensuring clearer communications and signal processing High performance: No external power supply is required to maintain signal integrity, efficient and environmentally friendly construction: Our RF filters are designed to withstand harsh use environments, ideal for amateur and professional applications It ensures consistent performance, bringing value and efficiency to your project or communication setup Operating frequency: 403±2.5MHz Insertion loss: 1.7db Out-of-band suppression: 60dB@50MHz Input impedance: 50 ohms Output impedance: 50 ohms Maximum input signal strength: 20dbm (100mw) Input interface: SMA-K (SMA female) Output interface: SMA-K (SMA female) No power supply required The product appearance and printed words depending on the batch, but this does not affect use. Color: Green Material: PCB Package Contents: 1 * Band Pass 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.