Your workshop's been feeling sticky and you're not sure if it's the heat or the humidity. This Jaycar unit reads both on one big LCD so you stop guessing. Flip between Celsius and Fahrenheit depending on who's reading it over your shoulder. The min/max memory holds your overnight highs and lows, which is useful if you're monitoring a plant room, a server closet, or a home office that gets stuffy by 2pm. Runs on a single AAA battery — the kind you've got in a drawer somewhere. Big enough to read from three metres back. Add to cart and stop squinting at your phone's weather app