Airthings AR-2950-N Wave Smart Radon Detector

UPDATE: Over the course of the 1 month return period with Amazon (about 45 days because I had two units), I tried to pin down the issue of varying measurements by contacting the customer support to see what they have to say. I provided all the details about 1) how long the two devices measured, 2) how close the two devices were to each other, 3) what the 1 day and avg on both, and so on, 4) that both were new units directly from Amazon, 5) and that both were reset together to measure over the same period of time. My responses were then ignored at least three-four times and every time I send a follow up message asking why it's taking so long (after 4-5 days), the same representative named "Joshwin" apologized and asked the same scripted questions again. When I respond him with the same answers, he then disappears and so I had to send a follow-up message. So this back and forth went for close to 45 days now and I said forget it, I will just return the Wave as well. I rate this company's customer support at the bottom of any company I've interacted with and I will never recommend this company or its product lines since I was never able to get an answer as to why the two devices had varying measurements. --- I initially bought Airthings Corentium Home and it has been reporting quite high radon levels - ranging from 3 to 11, averaging at 6.7ish. Because it was difficult to check it constantly as it is in the basement, I also got Airthings Wave so that I can check from my phone. Airthings Wave has been reporting 2 to 5 despite both devices are in the same basement only a couple feet away. I even reset the old device to ensure that they start measuring the radon level at the same time. Even now, the current readings are off by 2+ pci/l. I've reached out to Airthings support with my observations and despite that they asked a couple initial questions like did you start measuring at the same time, after I answered their questions, they have been silent. They did read my messages as shown in the chat history with them but they just do not respond. I guess they already know the potential inaccuracies in their products. Based on my experience, I am just not going to rely on Airthings products.