A system comprises an acoustic coupling product label (20) for mounting on a product to be serviced. The label (20) includes a memory (23) for storing information relating to the product to be serviced, control means (29) for controlling the flow of data from the label (20), an activation switch (22), and an acoustic transducer that emits tones corresponding to said product information. The system further includes a telephone (30) and a computerized product support system (50), which collects and interprets the information provided by the label (20). The control means (29) is arranged to control the flow of data from the label (20) to the system (50) at a rate and time required by the system (50).