Feature: Outdoor Antenna, LORA Antenna Outdoor Omnidirectional LTE Fiberglass Antenna Long for Fresh Air-Receiving AntennaThe antenna has an n-male connector, so it can be easily connected to the gateway and all other helium miners. The antenna can be used in any environment that requires LoRa connection over long distances, for agriculture, environmental monitoring and urban monitoringSuitable for miner (recommended by helium):BobcatNebra (indoor/outdoor)RAK wirelessRAK2 wirelessSyncrobitCal-ChipLongAPSensecapKerlinLow 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 better the antenna match)How to choose dBi? Lower dBI: Excellent performance on uneven terrains or hotspot high density areas. Higher dBI: excellent performance on flat terrain and low hotspot density. Middle dBI: ideal for those enorments that enter among others the enviorments described above. What is the rated profit and maximum profit? Rated gain refers to the stable value that the antenna can achieve under normal conditions, and maximum gain refers to the maximum value that can be achieved with the lowest loss and the best environment, but this value is not a fixed value, and the gain often fluctuates. Specification:Brand: STARFConnection: n-maleType: Omni fiberglass antennaFrequency: 860-930MHz (eu 868MHz, usa 915MHz)Polarization: vertical polarizationRated gain: 5.8dbi Maximum gain: 12dbi (not constant value, in case of lowest loss)Standing wave ratio: ge; 1.3 (dB)Impedance: 50 ohm Material: Fiberglass Connector Material: Copper Working Temperature: -40 - +85 Celsius Length: 550mm Relative Humidity: Up to 95% Packing List: 1 * Antenna 1 * Pair of ClipsNote: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Manual measurement, please allow 1-10mm error. Thank you for your understanding.