You can buy in: http://www.cablematic.co.uk/search/vp44/Wireless-Video-Transmitter-WiFi-HDMI-VGA-presentations/VP44/
Wireless Presentation System (WPS) is a system for transmitting VGA and HDMI video via WIFI. No cables are required to display the image from a computer on a remote screen is plugged WPS. The computers that connect to WPS only require to have WIFI or LAN connection. The software is downloaded from the WPS itself through IP. Real time transmission at 30 fps audio and video using the technoogy WIFI 802.11n.
Applications
Meeting where WPS is connected to a projector or screen. WPS can be connected to via WIFI up to 128 computers simultaneously. Pen-drive is supplied with control software to activate the computer that sends the image to the WPS.
Compatible operating systems Microsoft Windows, Apple MacOS, Google Android and Apple iOS.
Several computers share the same screen and the connection is wireless.
To send the signal to HDMI or VGA with analog audio to a remote display without wires.
To have a second wireless display that shows the same as the main screen.
Streaming audio. Allows playback of audio through the WPS. Supports most popular formats. Playing a SmartPhone based on iOS or Android. Ability to download the APP WiFi-Doc App Store or Google Play, install the APP on your smartphone or tablet, and digital signal send audio and video to WPS. MobiShow Support for iOS, Android and BlackBerry.
Specs
Supports up to 128 computers or notebooks connected simultaneously to WPS, but only one can showedar the image of your video on the screen connected to the WPS.
Compatible with Windows operating systems, Mac OS, Android and iOS.
Compatible with HDMI and VGA, SVGA, XGA and WXGA among other resolutions and color quality 16/32-bit.
WPS Access password protected and encrypted transmission WEP 64/128 (WEP, WPA, WPA2-PSK).
Compatible with most displays and projectors that have dand HD15 VGA, analog audio connection or HDMI digital AV type.
Easy to use software. Software included moderator to select the active computer.
Supports Fixed IP or DHCP.
Topology WIFI AP or Infrastructure mode.
Output resolutions supported by the VGA mode WPS: SVGA (800x600), XGA (1024x768), WXGA (1280x768), WXGA (1280x800) and WXGA + (1440x900).
Resolutionng supported by the WPS output using HDMI: 720p (1280x720).
Supports 3 user levels: Administrator, limited user and guest.
Web-based configuration SNMP.
Compatible with WIFI (802.11 n/b/g) and LAN 10/100 UTP cable.
The device has two connectors RSMA-Female (antenna), LAN connector (RJ45 female) VGA output connector (HD15 female), Audio output connector (minijack3.5 ") and connector HDMI digital AV output socket.
2 supplied WIFI antennas and power supply.
Size: 160 x 60 x 30 mm.
Weight: 317 g.