The AS-AYL-4 Loop antenna consists of
1. Controller, the blue box above.  It includes the pre-amplifier and bandpass filter.
2. Outdoor relay box that mounts on the antenna mast
3. AYL-4 Mast/Antenna kit, which includes a mast, wire loops, stakes and ground rod fixture.
or if you supply your own mast, we have
4. Wire Kit which has everything that the Mast/Antenna kit has except the mast.  Very desirable for overseas shipments.