It means that your blood glucose level is lower than measurement range, and you may have hypoglycemia. If you get repeated “Lo” results, consult a healthcare professional immediately.
It means that your blood glucose level is higher than measurement range, and you may have hyperglycemia. If you get repeated “HI” results, consult a healthcare professional immediately.
The batteries are running low. You have enough power left for about 50 tests, but you should replace the batteries as soon as possible.