An online card-present transaction system facilitates card-present type transactions with a merchant over a public network. The receiver performs a channel measurement for a receive antenna of the receiver using a signal transmitted from the transmitter to the receiver. The phase conductors are each electrically conductively contacted by cable connection bushes. An image of the fluoresced dermal surface is obtained and a biometric function is performed with data derived from the image. The devices are utilized with hose adaptors connected to vacuum or air hoses having specialized hose tips for coupling with the housing.