The SureCall Signal Booster kits will amplify the 2G, 3G and 4G LTE networks from most carriers in North America. The SureCall Kit features a powerful 72 dB gain amplifier, which is the strongest that can be sold in the United States, and can provide up to 10,000 sq ft (depending on existing outside signal strength), making this the ideal amplifier for homes and small to medium size offices.