A device has a support that can resiliently and removably grip an edge portion of a member with first and second portions thereof disposed on opposite sides of the member. A further portion on the first portion can operatively couple sensing structure to an electrical conductor portion on the third portion. A different embodiment has a support that can resiliently and removably grip an edge portion of a member with first and second portions thereof disposed on opposite sides of the member. A further portion on the support has circuitry coupled to a wireless communication portion on the first portion. Another embodiment has a support with structure supported thereon, the support resiliently and removably gripping the edge portion of a movable door with first and second portions of the support disposed on opposite sides of the edge portion.