Feature: Outdoor antenna 55cm, LORA antenna outdoor omnidirectional fiberglass antenna LTE outdoor long-distance receiving antenna The antenna has an N SMA connector cable, so it can be easily connected to the gateway and all other helium miners. The antenna can be used in any environment that requires a long-distance LoRa connection, for agriculture, environmental monitoring, and urban monitoring Low VSWR: The VSWR of this antenna is 1.1, which is lower than other similar antennas (the closer the VWSR is to 1, the smaller the reflection and the better the match of the antenna ) How to choose dBi? Lower dBI: Great performance on uneven terrains, or areas with a high hotspot density. Higher dBI: Great performance on flat terrain and low hotspot density. Middle dBI: Perfect for those eniorments that fall in between the other enviorments described above. What is Rated gain and maximum gain? Rated gain refers to the stable value that the antenna can achieve under normal circumstances, and the maximum gain refers to the maximum value that can be achieved under the lowest loss and the best environment, but this value is not a fixed value, and the gain is often fluctuating. Specification: Connector: N-Male Polarization: vertical polarization Frequency: 860-930MHz (EU 868MHz, US 915MHz) Maximum gain: 12dbi (not a fixed value) Rated gain: 5.8dbi Standing wave ratio: 1.9 (dB) Cable: RG58 Cable parameters: single core wire Cable outer diameter: 4.95+-5mm Cable material: PVC outer quilt Wire Type: High Braid Shield Impedance: 50 ohm Working temperature: -40~+85 degrees Celsius Relative humidity: up to 95% Length: 550mm Material: glass fiber colour: gray+black Package Contents: 1 x Antenna Kit 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.