In an air conditioner for a vehicle, a blower of a blower unit includes a double-axial motor having a rotation axis positioned approximately in a vehicle top-bottom direction, a pair of centrifugal fans located at two sides of the double-axial motor in an axial direction, and a pair of scroll casings in which the centrifugal fans are accommodated, respectively. The window is bounded by the intersection of a first zone and a second zone, wherein the first zone comprises a rectangular reference frame aligned detection window, and the second zone comprises a range estimate tolerance region defined by a range estimate for the candidate detection and predetermined tolerance limits. A mask pixel is a covered pixel when a shape to be rendered on a screen covers the mask pixel such that one or more coverage criteria is satisfied and is an uncovered pixel when the shape does not cover the mask pixel such that the one or more coverage criteria are satisfied. The first and second devices are within a wireless area of a second network that communicates with a second wireless protocol. The first and second axis are orthogonal and the first and second pairs of diametrically opposed probes are configured to generate a sum beam and difference beam in the at least one of the plurality of concentric waveguides.