Dongles connect to your electronic devices and stream media into that device for entertainment purposes. You can find a Wi-Fi dongle on eBay from several different brands, such as Samsung and Miracast.
One of the important aspects of these devices is the male plug, which can be either USB or HDMI as you connect the device to things like a TV or your computer and then connect it to your Internet. They are compact in size, especially useful when space is limited. The products may be compatible with specific devices, so be sure you are buying one that applies to your existing piece of equipment. A Wi-Fi dongle can be a useful addition to your electronic media collection.