STackSocial offers the AtmoTube Plus Portable Wearable Air Quality Device for $79.99. Coupon code "DN15" cuts that to $68. With $2.99 for shipping, that's the lowest price we could find by $8. Buy Now Features measures real-time air pollution barometric pressure sensor monitors air temperature & humidity Bluetooth 5.0 with up to 30-foot range
WD-40 is handy in a lot more situations than you likely realize.