Features: Using high-quality materials, the quality is guaranteed. This filter has a 1dB bandwidth of 4MHz and a steep cut-off characteristic. Performance optimization for 1840MHz RFID receivers and European standard LoRa IoT node devices, which can effectively filter out out-of-band signals, reduce noise, and increase dynamic range. Small and beautiful appearance. Easy to use and widely used. Specifications: Material: Metal Weight: 10g Size: 34x17.5mm/1.33x0.68inch Impedance: 50 Ohms Center Frequency: 1840MHz Passband (1dB bandwidth): 1810 ~ 1870 MHz In-band Insertion Loss: 1.7 to 2.2 dB (typ.: ~ 1.9 dB) Maximum Load Power: 100 mW (20 dBm) Interface: SMA-M, SMA-F Package Includes: 1x Bandpass Filter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.