zBooster for International Frequencies Extending Cell Zones for the Home or Office (White) Increases indoor signal coverage &#8211; up to 130 sq. meters or 1 - 2 rooms, no external antennas &#8211; one unit Easy to set up &#8211; just put it where you get signal and plug it in Supports 1 to 4 users operating on the same mobile network Compatible with phones, smart-phones and data cards using UMTS/2100MHz Extends phone battery life (uses less power when signal is stronger), Protects the operator&#8217;s network using patent-pending technologies