A coin acceptor includes a coin sensing station with two generally circular coils and an elongate coil mounted on one side of a coin guiding surface that is curved so that a coin under test is thrown by centripetal force into sliding engagement with the surface to form an inductive coupling with the coils to test coin acceptability. The first wireless interface device and the second wireless interface device are operative to wirelessly exchange data therebetween. A plurality of contact pads may be connected to a plurality of second active regions and a plurality of buried contact plugs may be connected to the plurality of second active regions via the plurality of contact pads. A lighter is coupled to the elongated body and is for applying lighting heat to the combustion zone at the stop for lighting a lighting end of a rolled tobacco product applied against the stop in the combustion zone from the first channel or the second channel. A method of resolution dependent filtering is also provided. In some embodiments, cement compositions are provided that comprise a hydraulic cement comprising an API cement, water, and a set retarder composition, the set retarder composition comprising an acrylamide polymer derivative; and an iron compound.