Bosto Kingtee is a family of products by Bosto International, a brand that specializes in the production of pen displays (a specific kind of Graphics tablet with an embedded LCD monitor) and is a direct competitor to Wacom and its Cintiq line of pen displays. The most actual info is at: http://www.pen-touch.com/
Contents
14WA
The smallest model in the family and the oldest still in production, this model sports a 14-inch screen with 10 express keys and a scroll wheel on each side of it. This model has had at least two different versions, an older one released in 2012 with a pen stylus powered by an AAAA battery and a newer version released in 2014 with battery-less pen stylus.
19MA
This model has a 19-inch screen with 8 keys and a scroll wheel on the left hand side only. It was introduced in 2011 on the Asian market. It featured a battery-less pen stylus. It was discontinued in early 2014 when the 22HD was released.
19MB
Released in 2012, this lighter version of the 19MA ditched the side keys and scroll wheel in favour of a lighter setup and more affordable price, while featuring the same battery-less pen stylus present in the 19MA. This model was discontinued on 2014 after the release of the 22HD.
22HD+
Originally released under the name of 22HD in 2013, it had some fabrication problems, which led to a factory replacement of all units sold and a renaming to 22HD+ so customers would know which was the new model and which was the one with problems. This model features a H-IPS high resolution full HD screen and a battery-less triangular pen with eraser on the back.
22HDX
Released in 2014, this is internally the same as 22HD+, featuring the same screen and pen, while adding an external case that is very similar to the 14WA (even having the same 10 keys and a scroll wheel per side pattern as the smallest model and the bottom curved shape)
22U mini
Released in the middle of 2014, this compact model features a different digitizer technology with a slim and more affordable version of the H-IPS screen making it more compact and a true replacement to the 19MB.