Shipping was fantastic! Easy to install. It has photoelectric and ionization technologies for added protection. It also has a silence feature. Used surprise points and paid less than six bucks!!!
Photoelectric and Ionization can't go wrong... the price was great as well and it comes with battery.
Purchased six items online and picked-up at the Sears store. Installation is DIY and so far all working as expected (note: Wrote the review within two months after install).
Also high marks for ease of installation, and good looks. Luckily it hasn't had an opportunity to alarm, other than testing, but it worked fine then.
I bought two of these with the ion sensor and photo electric sensor to keep my family safe. They are a good price and even come with batteries. Simple to install and they get the job done. Great price, and love ship to store to save on shipping.