Multi-band consumer antennas and adapters supporting 2.4 GHz, 3G, and 4G wireless LAN or cellular signals typically use an SMA (SubMiniature version A) or RP-SMA (Reverse Polarity SMA) connector type.A 2.4GHz/3G/4G multi-band wireless LAN antenna is an omnidirectional or directional device designed to capture and boost cellular (3G/4G LTE) and local wireless network (Wi-Fi 2.4 GHz) signals.Key Specifications & FeaturesFrequency Range: Covers 2.4 GHz ISM bands for WLAN/Wi-Fi alongside wide cellular ranges (typically 700MHz to 2700MHz for 2G/3G/4G LTE).Gain: Generally ranges from 3 dBi to 5 dBi, offering moderate signal amplification.Impedance: Standard 50 Ohms matching most routers and modems.Polarization: Vertical linear polarization for 360-degree horizontal coverage (in omni setups).