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2. 6 Electronics Retirees Should Buy From Costco on Black Friday

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   This system includes four wireless outdoor cameras and two indoor plug-in cameras. You can snag this system for $199.99, which is a $200 savings off its normal price. Sonos Sound System

3. Infrared lamp - Wikipedia

   en.wikipedia.org/wiki/Infrared_lamp

   It responds only to the rapidly pulsing signal created by the transmitter, and filters out slowly changing infrared radiation from ambient light. Infrared communications are useful for indoor use in areas of high population density. IR does not penetrate walls and so does not interfere with other devices in adjoining rooms. Infrared is the most ...

4. 5 Best Outdoor Items From Costco for Under $200 - AOL

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   DynaTrap LED Mosquito and Insect Trap. Price: $69.99. If you are planning to spend a lot of time outside, you will have company: bugs. Thankfully, Costco is ready to protect you from mosquitos and ...

5. Infrared cut-off filter - Wikipedia

   en.wikipedia.org/wiki/Infrared_cut-off_filter

   Infrared cut-off filters, sometimes called IR filters or heat-absorbing filters, are designed to reflect or block near-infrared wavelengths while passing visible light. They are often used in devices with bright incandescent light bulbs (such as slide and overhead projectors ) to prevent unwanted heating.

6. Passive infrared sensor - Wikipedia

   en.wikipedia.org/wiki/Passive_infrared_sensor

   A PIR motion detector used to control an outdoor, automatic light. A camera trap with PIR motion detector. An indoor light switch equipped with PIR-based occupancy sensor [1] A PIR-based motion detector is used to sense movement of people, animals, or other objects. They are commonly used in burglar alarms and automatically activated lighting ...

7. Best Outdoor Gear for Summer at Costco - AOL

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   Double-wall vacuum insulated stainless steel keeps beverages cold for hours, and a handy gauge helps you keep tabs on the pressure inside the growler. Costco $79 for 2