Bestsellers > Electronics > Security Sensors and Alarms

Skylink WD-101 AAA+ Window/Door Sensor


from: Skylink


: :Expand your AAA Home Smart Center home security system by monitoring additional entries to your home. The Door/Window Sensor for AAA is a wireless transmitter designed to protect doors, windows and other entrances, sending a wireless alert to your home security system upon a breach. The AAA Home Smart Center home security system is sold separately. Each zone in the AAA Home Smart Center home security system can support two sensors, so you can install a Door/Window Sensor for AAA on every likely entry ...

Heath Zenith SL-6105-WH Motion Activated Wall Switch


from: Heath Zenith


: :Controls 550 total watts incandescent of 400 watts flourescent lighting with rapid start ballasts. Adjustable daylight shut-off. Variable shut-off delay of 5 seconds to 20 minutes. Product Review:Imagine walking into a room and having the lights turn on automatically, then shut off automatically after you've left. All this can be yours with Heath Zenith's the SL-6105 motion sensor, which can be used to replace the manual switch for just about any incandescent or fluorescent light fixture.Installation is simply a matter of turning off ...

Heath Zenith SL-5597-BZ-B 200-Watt Quartz Halogen Motion-Sensing Twin Security Light, Bronze


from: Heath Zenith


: :Twin 100 watt quartz halogen lights, heavy duty die cast metal shell. 2 level lighting, low-level accent light with adjustable timer, settings include off, 3 hour, 6 hour, and dusk to dawn, and full bright when motion is detected, for selected time of 1,5, or 10 minutes. Automatically returns to dim mode after selected time. Automatic photocell deactivates unit in daylight to save energy. Pulse count technology reduces false sensing from wind and rain. Manual override turns light off or on with existingindoor wall ...

Heath Zenith SL-5316-WH-B Replacement Wide-Angle Motion Sensor, White


from: Heath Zenith


: :Replacement motion sensor for security lights, requires 120 volt AC, 60 Hz. Pulse Count technology reduces false sensing from wind and rain. 2 level lighting, low-level accent light adjustable timer settings include off, 3 hour, 6 hour, and dusk to dawn,and full bright when motion is detected. Automatically turns lighting off with time delay of 1, 5 or 10 minutes. Automatic photocell deactivates unit in daylight to save energy. Manual override turns light on or off when wired with a wall switch. Allows light ...

Heath Zenith SL-4192-WH Six-Sided Die-Cast Aluminum Lantern, White with Beveled Glass


from: Heath Zenith


: :Motion-activated lights are convenient and energy efficient, but they can be a little bulky and awkward to look at-in the driveway is fine, but you wouldn't want to put one on your porch. Unless it's one of Heath Zenith's porch lights, that is. These products give you the best of both worlds, combining motion-activation and traditional outdoor-light design.The SL-4192 is a six-sided wall-mount lantern that includes a hidden motion-sensing device that detects movement in a 180-degree radius up to a distance of 30 ...

Nortech 2.4GHz Wireless Baby Monitoring System w/ Remote Controlled Night Vision Camera


from: NORTECH


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Heath Zenith SL-5318-BZ-A Motion-Sensing Shielded Wide-Angle Twin Security Light, Bronze


from: Heath Zenith


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Safety Siren (HS80504) Propane and Natural Gas Detector Alarm


from: Family Safety Products


: :Natural Gas and Propane Gas Detector Have you lost your sense of smell? Are the gas fumes you smell dangerous? Do you sense a natural gas smell? If you heat water, heat your home or cook with propane or natural gas, you need a UL 1484 listed HS80001 combustible gas detector by Family Safety Products for natural gas measurement . This gas alarm Made in the USA keeps you safe from gas fume explosions and fires by detecting dangerous levels of hydrocarbon gases, specifically ...

Remote Control Door Alarm 100 Decibel As Seen on TV


from: As Seen on TV


: :Protect your home from burglars and intruders! Remote control turns alarm on and off for entry and exit. Works from inside or outside, up to 48 feet away. LOUD 100 decibel alarm - the same sound level as a chain saw or jackhammer! Alarm sounds when door is opened. Easy to install, no wiring needed. Works on any door or window!

Heath Zenith SL-6106-WH Vacancy Motion Sensor Wall Switch


from: Heath Zenith


: :Heath Zenith SL-6106-WH Motion Sensing Three-Way Switch, 150; Detection, WhiteHeath Zenith is synonymous with quality, integrity and innovation around the globe. They are committed to developing products that enhance their customer's lives through peace of mind, safety and convenience. Heath Zenith has been the leader in innovative and quality products for over 60 years.Heath Zenith SL-6106-WH Motion Sensing Three-Way Switch, 150; Detection, White Features:; Fits GFCI Replacement Plates; Fits Standard Wiring Boxes; Decor Plate and Screws Provided; UL/CUL Listed; 5 Year Warranty; Single Pole; ...



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Alienware's flagship gaming laptop, the Area-51 m9750, has plenty of appeal for high-end gamers, but the alien head aesthetic seems dated, and newer components are right around the corner.

The rise and fall of muni-Fi (and rise again): Clearly, the largest story involving Wi-Fi in 2007 was the at-first continued growth in cities awarding contracts with no money involved on their part to have service providers build Wi-Fi networks--and the subsequent failure of these networks to be built. Starting quietly in late 2006, the market shifted for metro-scale Wi-Fi. During 2007, providers decided that bearing the full cost of a city-wide network without city contracts wasn't financially sensible.

The full scope of the low uptake rates in cities that had large portions of the network built out also became clear: rather than 15 to 35 percent of residents subscribing, just a few percentage points would put a network in the top tier. Revenue is apparently also pretty minimal even in cities like Taipei, Taiwan, the network provider for which was predicting 250,000 subscribers by the end of 2006, and had just 30,000 regular users each month at last public report in early 2007.

MetroFi started to tell cities that without an advance service commitment at a minimum level -- an anchor tenancy -- the company couldn't proceed on networks. In 2007, MetroFi lost half a dozen bids or saw contracts canceled due to this change. Its work in Portland, Ore., the biggest network it was building, won't be extended beyond current limited dimensions until additional capital or a city commitment is obtained; the city has said it won't commit to service fees, however.

Meanwhile, EarthLink lost its CEO Garry Betty in January due to cancer. A strong backer of new initiatives to change EarthLink's core business, his death was certainly one of the causes in a quick re-evaluation of the municipal wireless division. New CEO Rolla Huff pulled EarthLink out of new deals, suspended existing ones, laid off hundreds of employees while gutting the metro Wi-Fi division, and appears poised to leave currently built or underway networks, including their flagship Philadelphia effort. They may sell the division, but it's hard to see much worth in it given the current state.

In a smaller bit of news, Kite Networks, formerly known by various names, was sold by parent MobilePro to Gobility with conditions that according to SEC filings by MobilePro weren't met. Kite was once high flying, in the company of EarthLink and MetroFi as one of the major U.S. Wi-Fi network builders. Now it's still in that company, with work on its Arizona networks apparently halted. A suitor has emerged in the form of a regional telecom that specializes in the Hispanophone market (double entendre intended), and which thinks it could boost Tempe subscriptions from the current several hundred to about 300 times that number. Hope springs eternal.

And while AT&T was able to launch a Riverside, Calif., network with MetroFi handling the installation and operation, it backed out of St. Louis, Mo., due to a utility pole problem, and the bidding in Chicago, too. The Metro Connect consortiums in Sacramento and Silcion Valley were unable to raise financing despite the apparent blue-chip participation by Cisco, IBM, and Intel.

County-wide Wi-Fi was also hit again and again by providers who pulled out--CenturyTel in Pierce County, Wash., for instance--or problems with technology or utility poles. In a few scattered areas, Wi-Fi across counties has been built out, but it's not an idea whose time has yet come.

Muni-Fi isn't down for the count. While these high-profile networks in large cities and county-wide networks have mostly hit the skids, more modest networks with well-defined goals continue to be built with a focus on public safety and municipal uses in hundreds of small and medium-sized towns. Brookline, Mass., may be a good example, in which a public safety/public access network was built relatively quickly and with no reported problems.

And there's one big city success story: Minneapolis, Minn. While local provider US Internet wound up spending more than they'd intended, reports from the ground indicate that service works quite well, and subscriptions and interest are quite high. The company was able to respond almost instantly to the bridge collapse a few months ago by deploying additional mesh infrastructure to add network capacity in the area. And it says that it could reach positive cash flow in early 2008. One of their advantages? They secured a substantial commitment from the city for the services they built.

Other trends of the year gone by: Music and Wi-Fi are clearly more aligned, with the new Zune models and firmware from Microsoft allowing wireless sync (but not yet Wi-Fi purchases), and the introduction of both the Apple iPhone and iTunes touch, which allow music purchases over Wi-Fi but not synchronization. (While the MusicGremlin preceded both the Zune and iPhone/iPod options, it didn't seem to gain any market traction in 2007.)

Security continues to be a concern in 2007, although less of one as home users have clearly accepted WPA Personal, at long last, and networks are increasingly encrypted through better software from major hardware manufacturers. Wizards make encryption a no-brainer, when they work. Corporations stung by reports and by requirements from credit card issuers are also clearly protecting their networks better, although I'm sure we'll still see breaches at those firms that didn't cross every "t."

The 802.11n standard's emergence into an interim certified Wi-Fi state was also a significant milestone for faster wireless networking. Shipments of Draft 802.11n products in 2007 increased significantly, while prices dropped so much that it makes perfect sense to purchase a $50 to $80 Draft N router than a comparable G unit. Manufacturers made it clear as the year progressed that hardware sold today should generally be firmware upgradable to whatever the final, not much changed 802.11n standard is when approved in 2008.

Gadget-Fi continued on the rise, as an increasing array of devices included Wi-Fi as a connectivity option. Most notably, T-Mobile launched its HotSpot@Home service, the largest scale offering of converged cell/Wi-Fi calling. By year's end, they had four handsets for sale--two plain, a BlackBerry, and a clamshell--but subscriber numbers are unknown.

What's coming in 2008?

In-flight Internet (over Wi-Fi): 2008 is finally the year. It was supposed to be 2005. Or maybe 2002. But we should see a number of planes, mostly flying over the U.S., equipped with either in-flight Internet access or in-flight text messaging and text email. Connexion by Boeing's failure fortunately didn't discourage a half a dozen competitors who were in the R&D phase when Boeing wrote off its satellite-based Internet access venture.

AirCell, Row 44, OnAir, Aeromobile, Panasonic Avionics, and a T-Mobile consortium are among the announced or nearly announced firms with commitments or trials underway. AirCell and Row 44, focused on the U.S. market, plan to deliver Internet not voice to fuselages; OnAir and Aeromobile are working on mobile-based services, including voice, via existing cell phones and devices.

In 2008, American, Alaska, and Virgin America will launch trials over the U.S., and potentially move into production. OnAir should be expanding in Europe beyond the single French aircraft that's equipped in a trial now to RyanAir's fleet. And Aeromobile's Qantas trial could turn into real usage. There's likely action that will happen in Asia and the Middle East, too, that's not yet disclosed.

Other trends to watch

Wi-Fi in every smartphone with better integration. The iPhone was the leading edge, pun intended, offering 2.5G EDGE cell networking as part of the subscription price, along with seamless roaming to Wi-Fi networks. With RIM finally offering BlackBerry models with Wi-Fi, it's unlikely that any future smartphone model intended for serious users would lack the option.

Wi-Fi everywhere. Despite the setbacks in municipal Wi-Fi, wireless networks continue to expand, with better and better coverage found across larger areas and more locations. 2008 might be the year of hotspot saturation.

WiMax arrives. In 2008, we'll finally see production mobile WiMax in action in the U.S., and the questions about whether it works well enough and fast enough at the right price to beat current generation cell data networks, and make money for the disorganized Sprint Nextel will be answered. More certainly, Clearwire, with WiMax as its only option, will push aggressively to steal customers away from fixed, wired broadband, especially in markets with little competition.

Gadget-Fi a go-go. Wi-Fi will become an expected part of gaming consoles (already found in a few), cameras (found in crippled form in just a handful), regular cell phones (in dozens and dozens now), and music players (with more full functionality).








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Shopping  Created at Sun Oct 12 22:53:17 2008