Usage Tips:BANDPASS FILTER: 144MHz 2 meter band bandpass filter with compact structure, which has excellent selectivity and high out of band rejection. 144MHZ FREQUENCY: Suitable for all 144MHz miners and antennas, low pass filter with stable structure, excellent performance and long service life. GOOD COMPATIBILITY: Designed for LoRa IoT application, compatible with most helium miners on the market, for Nebra hotspot miner, for V2 hotspot miner, etc. BANDWIDTH RANGE: The filter has SMA interface, 3dB bandwidth is 127~157MHz, 30dB bandwidth is 105~200MHz, with low loss and carrying power. ALUMINUM ALLOY: The bandpass filter is made of aluminum alloy material, resistant, not easy to deform or wear for long term use. Specification: Item Type: Bandpass Filter Impedance: 50ohms Center Frequency: 144MHz Center Frequency Insertion Loss: 2.5-3.0dB 3dB Bandwidth: 127-157MHz 30dB Bandwidth: 105-200MHz Maximum Carrying Power: 3W (35dBm) Interface: SMA M, SMA F Color: As Shown Material: metal 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.