Today only, Target offers the second-generation Nest Protect Smoke & Carbon Monoxide Alarm
, model no. S3000BWES, for $99.99. Coupon codes "CYBER15" and "TGTGQJV7" cut it to $79.99
With free shipping
, that's the lowest total price we could find by $19. It features an industrial-grade smoke sensor, can send alerts to your phone, and purports to last for up to 10 years.