Dr Tech&reg; 2G 1900 MHz Cell Phone Signal Booster Amplifier Repeater PCS GSM for T - Mobile US PCS 1900MHz with outdoor antenna 11,000 sq ft coverage area Frequency range: Uplink: 1850 - 1910 MHz ; Downlink: 1930 - 1990 MHz Designed for easy installation and simple to use Greatly reduces dropped calls, extends signal range, and increases data rates