Abstract: In a car stereo system, when an object such as a hand comes close to a sensing range of a proximity sensor provided near an illumination button while a display section and lights of an operation section that are provided on a front face of the car stereo system are in a state of complete non-lighting, only the light of the illumination button is turned on; if the illumination button is operated within the predetermined period of time, then the display section and the lights of the operation section are turned on; and if the illumination button is not operated within the predetermined period of time, then the light of the illumination button is turned off so that the state of complete non-lighting is entered again.

Abstract: An attachment section 215A is approximately vertically cut and raised in a tongue-shape on a lateral section 212 of a lower casing 210 provided by press working of a steel plate in a manner that an outer side of the lateral section 212 becomes an upper side of the attachment section 215A on which a circuit board 400 is mounted. A support section 215B is cut and raised on a bottom section 211 of the lower casing 210 so that the lower side of the bottom section 211 becomes opposite to an end surface 213 of the lower casing 210 and a tip end contacts approximately in parallel to a lateral side (in projecting direction) of the attachment section 215A. Attaching force applied when the circuit board 400 is attached to a threaded hole 216 of the attachment section 215A by the screw 410 is received by the support section 215B, so that the axial direction of the screw 410 and the axial direction of the threaded hole 216 are substantially aligned, thereby allowing proper attachment of the circuit board 400.