Costco has carbon monoxide alarm, at $34 it seems kind of pricey however i need to replace the two in my house. I found that Amazon has a different variety for about the same price: https://amzn.to/2H9DTRo
Products used in this video:
Samsung S8 Unlocked Smart Phone: http://amzn.to/2CaLhxm
Microphone: Blue Yeti USB Microphone – Silver http://amzn.to/2D9hW37
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