Abstract: An ultrasound imaging device is disclosed including a transducer with two elements having different operating frequencies, which are arranged to be coaxial. The device has four modes of use, the first mode of use being use of one element for imaging at a first depth range, the second mode of use being use of the other element for imaging at a different depth range, the third mode of use being tissue harmonic imaging, and a fourth mode of use being demodulation imaging. A single image produced by the imaging device includes data contributed by two or more of the modes of use.

Abstract: Systems and methods are disclosed that relate to providing information about an item available for sale. This item is selected for purchase by a buyer, and the location information of the buyer and seller are exchanged. As the buyer approaches the seller, the location of the seller is reported to the buyer. The sale can be completed upon the arrival of the buyer to the seller.