Various techniques are disclosed for providing electrical power and/or data from the interior of a building structure to a device at the exterior of the structure without piercing (e.g., making a hole through a wall or window frame) the structure. A camera surveillance system for an embodiment includes self-adhesive energy transfer units that can be placed on either side of a window so that electrical power is passed via the energy transfer units from inside a building to the outside without the need for making a hole in the window or building through which to pass electrical wire to feed power and/or data to/from the camera surveillance system. One of the energy transfer units may be integral with the camera surveillance system and the adhesive may be strong enough to support the weight of the camera surveillance system on the window. The camera surveillance system may be installed without the need for tools.