The Bolton Technical 4” Magnet Mount antenna is a wideband outdoor antenna that captures existing cellular signal across the 700-2700 MHz frequencies. It gives up to +3 dB of gain. This antenna is meant as a replacement for any vehicle signal booster with SMA connectors. Magnet mount antennas adhere effortlessly to the outside of any vehicle. Who is this for? Anyone who needs a replacement/upgrade for their vehicle antenna