A metal pipe of single piece construction including a wall formed of a single corrugated metal sheet. A wristwatch can use an accelerometer to detect the orientation andor movement of a user’s wrist and subsequently activate audio time reporting, without requiring the user to find and lush a small button. The curing agent is also obtainable by subjecting an organic compound and a cyclic polyorganosiloxane to hydrosilylation reaction. A second object profile of the object is detected using a non-vision object detection device. The device has a housing able to receive and hold a portable telephone, a connector for connection with the portable telephone, and a data processor able to receive information relating to a payment and to exchange data with a remote server via a telephone communication implemented by said portable telephone. Similarly, a viewer can navigate from national product to local product ad, or classified ad category to specific classified ad, or bulletin board topic category to specific posting.