Thermometer Hygrometer?

[Homebody]

ive seen a bunch of youtubers that have square boxes in their BP tubs/racks that are used to keep track of the temp and humidity, but all the ones im able to find only allow one sensor per gateway or arent waterproof incase one of my balls knocks over their waterdish, does anyone have any recommendations? looking for one that is waterproof, can have multiple sensors per gateway, sensors that arent huge and will take up a good size of the tub and that can connect to wifi thanks for any feedback!

Sorry, but I just can't picture what you're talking about. Please post a link to or a pic of the thermometer/hydrometer you're referring to. A pic of your rack would help as well. Thanks.