Thx is going to be the big mystery… purewrist in the USA had a similar 3 year expiry claim… turned out their chips were manufactured 2 years ago and people ended up with an implant with about a year’s life left. Since this is a prepaid card they are limited to a maximum of 3 years from the date of manufacture. I’d find out what the actual expiration date is on the wristband before sending for dngr.us/conversion