Tags and Tag Read (V2) are diagnostic tools we have added to our Settings menu to test whether a tag is being detected within the required range of the watch. The watch should be able to detect tags within 8cm when the watch is worn on the wrist. There can be instances where a tag struggles to be detected by the watch. If you noticed after uploading several rounds of data that one of your tags is not being detected then we recommend you undertake a tags test. Please email us at email@example.com for instructions on how to conduct the tags test.