The Pulse Electronics MS3E800SMA is an external/in-building antenna designed to enhance signal strength and reception for cellular and wireless devices. With a stick/whip design and magnetic mount base, this antenna provides a convenient and reliable solution for improving signal quality in various environments. It is compatible with SMA connectors and offers a wide frequency range to support various wireless technologies. Whether you're in a building or on the go, the MS3E800SMA antenna from Pulse Electronics ensures that you stay connected with a strong and reliable signal.