Bests & Worsts Reviews from Amazon

This thing is inaccurate. I bought the unit on the left two days and wanted to double. Heck it’s accuracy so I order the one on the right. I am getting a 8% different from that unit. All four are sitting right next to each other and has had time to balance out. Per the item description, Humidity accuracy is supposed to be +/-3%. As you can see, it’s inaccurate.