The device is called the Three Web Cube. As you can see in the images pulled from coolsmartphone, it is just that, a cube. The Cube is made by Huawei, a name we are all familiar with. Located on the top of the side of the Cube is the SIM card slot. There is also a micro USB port as well and you have a single power cord to plug into a wall outlet. The Cube offers Three UK mobile broadband speeds up to the theoretical 21.6 Mbps down and 5.76 up. You can connect up to five devices to a single Cube and it has its own SSID and network key.
You have a few choices as for how to get one and the costs. you can buy one out right for £59.99 on a month to month basis of 10GB of data for £15, or you can get one free with a 2-year contract and 15GB of data for £15.99 a month. Which is about $20 bucks a month either way. You can check them out at the Web Cube page at Three UK
Via Coolsmartphone