The EB-FR01-S4-250-UFL2R is a type of antenna made by Fractus Antennas. It is a high-efficiency, omnidirectional U.FL (ultra-miniature coaxial connector) monopole antenna specifically designed for use as an integrated antenna in combinations of LoRaWAN/IoT/M2M devices typically operating in the 863-870MHz frequency band. This antenna has a wide range of applications suitable for consumer and industrial electronics. It has a gain of 4 dBi and a radiation efficiency of over 90%. The antenna has a patented folded-Dipole structure with integrated balun, low-profile design and the flexibility of omnidirectional radiation in the omni direction. According to Fractus, the EB-FR01-S4-250-UFL2R offers excellent results in terms of efficiency, polarization purity, bandwidth, low-VSWR, low-PIM and low-standing-wave-ratio (SWR).