SureCall FlexPro Yagi/Whip, Dual Band Cell Phone Signal Booster Kit for All Carriers up to 3,000 Sq Ft Boosts Voice and Text Signals for All North American Cell Carriers Reduces Dropped & Missed Calls. 2G - 3G Home / Office Signal Booster Kit Covers 2-4 Rooms of a Home or Small Office, up to 3,000 sq ft Increases Signal Strength & Extends Battery Life for all cellular devices Please note indoor coverage area will vary based on available outdoor signal strength: 1-2 Bars ~1000 sq ft, 3-4 Bars ~2000 sq ft, 5 Bars ~3000 sq ft