Thumb Score: +1
I don’t know who keeps marking this expired… Walmart still has it for the same price while amazon went up.
These normally sell for about $ 11. These are good to see the humidity in your house which should be about 50% to prevent mold growth so you know if you need a dehumidifier, or a humidifier usually in the winter to keep you and your house from drying out too much. These also help your house to last longer if you keep the humidity about 50%.