F20 Series | Cell Phone Signal Booster For All European Carriers on Band 1, 3, 7 & 20 | 70dB Max Gain Cellular Repeater | Boost 4G LTE 3G GSM Signals | Comes with Omni-directional Antenna

This device enhances cell phone signal compatibility with various European carriers and networks. It features an LCD screen, AGC function, and a built-in antenna for signal amplification, with a coverage area of up to 400 square meters.

• The description claims a maximum signal gain of 70dB and 32X signal amplification.
• The description claims a coverage area of up to 400 square meters.