To achieve the proper air pressure adjustment of a tire matching the change of a temperature, and to further improve convenience for a user.
A portable unit 2 carried by a user is provided with: a BT communication part 24 for acquiring air pressure information of the tire of a vehicle C and information of the temperature of the tire; a display unit 29 for displaying the information of the air pressure of the tire obtained by the BT communication part 24 and the information of the temperature of the tire in association with each other; and a storage part 25 for storing the information of the air pressure of the tire and the information of the temperature of the tire obtained by the BT communication part 24 in association with each other.
COPYRIGHT: (C)2010,JPO&INPIT
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Taihei Nonobe
Takanori Kubo