The Sensi Volcano is an easy-to-use , discreet and highly-effective bed bug capture device and can be used in any environment. Bed Bugs are known to travel along seams and edges, thus to increase the chance of detecting bed bugs with a monitor, place monitors in areas of suspected travel (i.e. legs of bed). The volcano is constructed by snapping the clear bottom onto the black top. All volcanos are made in the USA and recyclable.