The Fusion2Go Max features SureCalls patented Extended Range Technology (ERT) for maximum performance across all areas of the road. ERT amplifies cell signals outside the vehicle, bypassing cable loss and producing faster data speeds while keeping users connected farther from cell towers than any other booster. The Fusion2Go Max also boasts 2XP technology to further boost the vehicle-to-cell tower range by increasing the uplink transmission power two-fold. With both ERT and 2XP working in unison, the Fusion2Go Max is the best performing cell phone signal booster for the road bar none. ERT offers fastest speeds & longest cell tower reach. Supports the largest number of simultaneous users. Works with all North American carriers. Compatible with all cellular devices, including hotspots, while extending battery life. 5G Phone Compatible - Boosts voice and 4G LTE data signals on 5G phones and devices. 2XP technology offers 2x uplink power for best performance in the most rural/remote areas. High quality materials for longevity and connectivity when you need it. Assembled and tested in the USA.