I was given this at Vintage Gamer in Halesowen when I bought some Pong consoles, it is a clone of the game "Simon" with some extra games included. This one is the 1987 version, there was an earlier version and a later version, as well as a full size version, and it would seem versions from other manufacturers such as the Grandstand Adam
The Mini Wizard is more squarely shaped than the circular Simon, and has more features than just the memory game, which I was never any good at
Video Technology, AKA VTech. Also nice bright colourful buttons with flashing lights
On the base is the speaker and battery compartment which requires four AA batteries
A look around the game, there is a power switch on one side
This is the instruction leaflet, it is all in English and explains the four games in detail, along with some simple tunes that can be played with the four buttons
9 - STOP statement, 500:1