This little unit is perfect for the indoor plant lover as it has all the functions you need - current/min/max relative humidity and temperature. There's a reset button on the back so you can measure the minimum and maximum values in an area over a day or so, reset it, then measure a different room.
Does a little diffuser increase the humidity? How long does it stay humid for in the bathroom after a shower? Do pebble trays really raise the humidity? Do heaters affect the humidity for your plants? Is it more humid in your north facing room or your southern room? Do plants placed together create a higher humidity microenvironment? It's highly addictive learning this stuff and I now know the answers to these because of this hygrometer. So buy one and you will too! It's simple and easy to use and the quality is great. You won't be disappointed.