4G Slim Low-Profile Antenna (https://www.weboost.com/products/4g-slim-low-profile-antenna-for-cars-and-trucks-314401) The weBoost 4G Slim Low-Profile Antenna compact design makes it simpler to install, while giving you improved performance over previous models. When connected to any weBoost multi-user cellular booster, this antenna provides enhanced reception of calls, texts and data to the booster, providing superior performance when connected in your car, truck or SUV. Installation is simple: place the antenna vertically or horizontally and you’ll still get optimal performance.