Made in China by Watara in 1992
The Supervision was first sold in 1992. Trying to compete with the Game Boy by offering a very low price on the unit and games, they thought that they could had taken a piece of the market with their system. Similar to the Game Boy in hardware and design, it has some advantages: the screen has a better resolution and a bigger size, the console could be bent (well some Supervisions) to adjust the screen preventing unnecessary wrist torsion. It also has a better stereo sound using an extra DMA channel.

tech info

resolution: 160 x 160 x 4 grays
CPU: M65C02 8-bit VLSI at 4 MHZ
sound: 4 FM channels + noise