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

   www.aol.com/finance/6-electronics-retirees-buy...

   And if you have a Costco membership, then the savings is going to be even greater. ... From Nov. 18 to Dec. 2, you can purchase an 8-piece Ring Alarm home security system for $119.99. This is $80 ...

3. Power inverter - Wikipedia

   en.wikipedia.org/wiki/Power_inverter

   Sine wave. A power inverter device that produces a multiple step sinusoidal AC waveform is referred to as a sine wave inverter. To more clearly distinguish the inverters with outputs of much less distortion than the modified sine wave (three-step) inverter designs, the manufacturers often use the phrase pure sine wave inverter.

4. Power electronics - Wikipedia

   en.wikipedia.org/wiki/Power_electronics

   If more than two voltage levels were available to the inverter output terminals, the AC output could better approximate a sine wave. It is for this reason that multilevel inverters, although more complex and costly, offer higher performance. [18] Each inverter type differs in the DC links used, and in whether or not they require freewheeling ...

5. Grid-tie inverter - Wikipedia

   en.wikipedia.org/wiki/Grid-tie_inverter

   Inverters that target commercial applications are available for 208, 240, 277, 400, 480 or 600 VAC and may also produce three phase power. Peak efficiency: The peak efficiency represents the highest efficiency that the inverter can achieve. Most grid-tie inverters on the market as of July 2009 have peak efficiencies of over 94%, some as high as ...

6. Monitronics - Wikipedia

   en.wikipedia.org/wiki/Monitronics

   In 2015, Monitronics acquired LiveWatch, a Kansas-based company that sold security alarm and home automation systems for DIY installation. [5] The company was founded in 2002 under the name Safemart by Chris Johnson, a former Kansas paramedic. Initially, SafeMart distributed home security products from third-party manufacturers.

7. Costco says its new member ID scanners at entrances are good ...

   www.aol.com/costco-says-member-id-scanners...

   If you are a Costco worker who wants to share your perspective, please contact Dominick via email or text/call/Signal at 646.768.4750. Responses will be kept confidential, and Business Insider ...