While these mouse pads aren't electronic...
They're FOR electronics, as their only use is to rub a computer mouse around upon. The Sega Shop released 3 mouse pads to celebrate Sonic Mania Plus in 2018. Each pad is 13 dollars & is standard sized & made of the standard rubbery foam.

The first one is quite bright. It's a quite bright yellow, with just the full color, shaded Mania plus logo. The second has just the Plus cast, shaded & stacked up on a bright blue background. The third combines the 2 other designs, adding the logo at the top & laying the characters (in the same poses) out in a "V" shape so they fit under it. With the classic looking logo or the nice neoclassic art, these are pretty fun pads.