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  2. Carbon monoxide detector - Wikipedia

    en.wikipedia.org/wiki/Carbon_monoxide_detector

    The alarm points on carbon monoxide detectors are not a simple alarm level (as in smoke detectors) but are a concentration-time function. At lower concentrations, e.g. 100 parts per million (PPM), the detector does not sound an alarm for many tens of minutes. At 400 PPM, the alarm sounds within a few minutes.

  3. How to factory reset your iPhone and wipe its data, whether ...

    www.aol.com/news/factory-reset-iphone-wipe-data...

    You can reset your iPhone to its factory settings and erase all the information stored on the device. Just make sure to back up your data first.

  4. Carbon dioxide sensor - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide_sensor

    CO 2 concentration meter using a nondispersive infrared sensor. NDIR sensors are spectroscopic sensors to detect CO 2 in a gaseous environment by its characteristic absorption. . The key components are an infrared source, a light tube, an interference (wavelength) filter, and an infrared detec

  5. How to Factory Reset Your iPhone to Delete Everything on It - AOL

    www.aol.com/lifestyle/delete-everything-iphone...

    The post How to Factory Reset Your iPhone to Delete Everything on It appeared first on Reader's Digest. Before selling or recycling your old one, take these steps to protect your personal data.

  6. AOL Mail

    mail.aol.com/d?reason=invalid_cred

    Yes! You can take your email on the go with an iOS & Android app.

  7. iPhone 12 - Wikipedia

    en.wikipedia.org/wiki/IPhone_12

    The iPhone 12 features a 6.1-inch (155 mm) display [33] with Super Retina XDR OLED technology at a resolution of 2532 × 1170 pixels and a pixel density of about 460 ppi. [34] The iPhone 12 Mini features a 5.4-inch (137 mm) display with the same technology at a resolution of 2340 × 1080 pixels, and a pixel density of about 476 ppi.