Abstract: A circumferential switch has a flexible electrically conductive band positioned around and separated from an outer circumference of a tubular body so that an air gap is formed between the band and tubular body. The band is electrically connected to a circuit board, contained within the tubular body, by a lead that passes through a circular hole in the tubular body. The circuit board is in electrical contact with the tubular body, which is also electrically conductive. The switch is in a first state in its normal position, i.e., positioned around and separated from the outer circumference of the tubular body. The switch changes states only when any part of the band makes contact with the tubular body. Thus, when the band is depressed by being squeezed, i.e., deflected, the band makes electrical contact with the tubular body, and the switch is in a second state.