Review on ORIA Thermometer Hygrometer: Bluetooth Sensor with Data Export, Alerts & Monitoring, 2 Pack by Andrew Webster

I bought this to measure the temperature/humidity in a solar oven outside. If it were summer I would see it "roasted" from the excessive heat. I'm in Virginia and although temperatures are around or below freezing, it usually isn't for long stretches. I expected the cold to drain the batteries. One of the two devices I received is still working and the battery life was good. The other - it stopped working so I assumed it was the battery and replaced it. I can't get it back or connect to my phone. To be honest, I should have gone for a more high-tech system than this, and I probably will. Too bad it fell apart so quickly.