The EOS XB sounder box kit is housed in its own zipped pouch. This contains 3 x 5m leads fitted with 2.5mm jack plugs, plus a choice of back plates. The first allows the XB to be secured to a bankstick & the second features a magnetic plate allowing the box to be fitted to the skin of the bivvy using the supplied counter magnet. The EOS XB is compatible with all Micron / Eos alarms, has protected coated circuits, low battery drain & a high output speaker.