Electronics Repair Questions? Ask an Electronics Technician
Welcome to JA, sorry to hear you are having issues with the accuracy of your Swim2 watch, have you setup the pool length on the device?
I haven't heard back from you in some time, but can confirm there is no calibration setting other than the pool length which can be set, so in the first instance would make sure the pool length is correctly set on the watch
Do let me know if you need anything further.