This signal amplifier is crafted to strengthen mobile signal coverage for both the 2G and 4G network users. Its amazing power transforms the weakest outside signal, like 1 bar into a raging and steady 5 bars across the whole covered area. This gsm repeater works within the coverage of up to 150sqm, making it a good fit for small offices, boats, or apartments. It operates within the 800MHz and 900MHz network frequencies and with such UK network providers as O2, Tesco Mobile, GiffGaff, TalkTalk and Vodafone. Boost your network signal and forget about dropped calls and constant buffering and internet dead zones.