Outdoor 4G LTE Antenna QOLTEC 57021 — 18 dBi gain, 600–2700 MHz, 50 Ω, 50 W, white plastic housing

The 4G LTE Antenna Qoltec 57021 18 dBi Outdoor is an external cellular antenna designed to improve reception for 4G LTE devices. Intended for outdoor installation, it increases signal strength and stability for routers, modems and other equipment with an external antenna input. The model is identified by MPN 57021 and EAN 5901878570211.

Advantages

The antenna provides a high directional gain of 18 dBi to enhance reception in areas with moderate to weak cellular coverage. It is built for outdoor use to reduce interference from indoor obstructions and allows flexible placement to optimize signal quality. Compatibility with devices that accept external 4G LTE antennas enables improved connectivity for routers and modems.

Suitable for

• Improving 4G LTE signal for home routers and modems
• Enhancing connectivity at small offices and remote locations
• Use with gateways and equipment that support external cellular antennas

Key specifications

• Brand: QOLTEC
• Model: 57021
• Product type: 4G LTE external antenna
• Gain: 18 dBi
• Intended use: Outdoor (external) installation
• Category: Wi‑Fi antennas / cellular accessories
• MPN: 57021
• EAN: 5901878570211

How to use

Select an elevated outdoor mounting location with a clear line of sight toward the nearest cellular base station when possible. Secure the antenna to a mast, pole or wall mount using appropriate brackets and hardware, run the antenna cable into the building and connect it to the external antenna port of your router, modem or gateway. After connection, adjust the antenna direction gradually while monitoring signal levels on your device to find the optimal orientation. Use weatherproofing for external connections and fasten cables to prevent movement.

Recommendations

Verify compatibility with your modem or router before installation. For best results, mount the antenna away from large metal surfaces and sources of interference; use a low-loss coaxial cable and proper grounding for outdoor installations.