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Is there such a thing as a wireless VGA adapter that does not need drivers or software. This would need to be connected to a TV from a laptop and display the desktop. Effectively it would be like a VGA cable but without the wire.

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Shopping recommendations are off topic as you can read in the FAQ – slhck May 17 '11 at 14:39
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Edited to make it less recommendy. – Linker3000 May 17 '11 at 15:04
There is the Intel Wireless Display, but it only works with one laptop as it is a built-in feature. – Thiago M. May 17 '11 at 15:17
You could buy a wireless graphics card (yes, seriously: bit-tech.net/news/hardware/2011/01/12/…) although the cost is going to be a bit higher than you'd like it to be. – tombull89 May 17 '11 at 15:27
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Current Wifi standards don't have the throughput to support a display signal stream, but you can get USB multimedia adaptors as a quick browser search will confirm - do a search for "usb multimedia link"

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People like inFocus and other projector companies have offered this for a number of years, Worked with 802.11g Fit on the projector DVI port. Now have USB device that plugs in and use 802.11n – Dave M May 17 '11 at 16:20
Hmm - I'll do some digging - I understood that the devices used a proprietary protocol to reduce packet latency and other issues... – Linker3000 May 17 '11 at 17:56
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