This certified 3dBi LoRa antenna from Eoth is not a GSM-LoRa Combo antenna that shares its gain across a large range of frequencies (GSM and LoRa frequency) which results in poor performance (V.S.W.R bigger than 3). This is a LoRa-spesific antenna that is spesifically designed to tune at frequency just around 868-915MHz, so the performance will be top notch. Features: + Waterproof Design Rubber protector, waterproof and prevent oxidization + High Quality Interface Quality screw interface, makes the connection closer and signal more stable + Flexible Wide-angle 90° - 180° elbow, adjustable to your needs + RoHS certified Spesifikasi: Center Frequency: 868 ~ 915MHz Polarization: Vertical Polarization Gain: 3dBi V.S.W.R: lt;=1.5 (Very Good) Impendance: 50 ohm Radome Material: ABS Connector Material: Copper Operation Temperature: -40 ~ +85 °C Length: 105mm Relative Humidity: Up to 95%