Kardiamobile heart monitor.

[romney69mike]

This will not give correct reading if you have existing heart problems or Parkinson's. They say 30 day money back guarantee but won't honour this. In sales advertising they don't mention  having any existing health issues.

[tobiasd4]

Ebay MBG is only 30 days.

But if UK business seller, you are covered for longer.

Try contacting your payment provider or https://www.citizensadvice.org.uk/

[jckl1957]

If you bought from a private seller, they don't have to accept 'change of mind' returns.

Business sellers have to accept returns for any reason for a minimum of 14 days.

If you bought from a private seller and opened a return using a 'change of mind' reason, such as you ordered the wrong item, the seller would not have to accept the return.

With items like this, it's really important to do your research before you buy to make sure such an item is appropriate for you.