This is an interesting mixture. A Coleco item with Sega stuff on it. It has 20 Sega Game Gear and Master System/Genesis titles. It is confirmed to have Sonic 1, Ecco the Dolphin, and Triple Trouble. Does it have more Sonic content? The mix of GG and console titles are interesting. This is another thing you can also plug into your TV--likely a help with the GameGear stuff.

It could be at Target stores in the USA in 2007, but apparently it didn't sell too well.
Credit to [Darkmech] for finding out about this item.

There were probably 2 of these released. Or a 2nd release that looked the same as this one. It was likely called the Coleco Sonic although it had mostly other games. It was out in winter 2006 as well. The other had a slightly different game selection. The 2nd edition game list is below. It did NOT have Sonic1 nor Ecco 1. The item also had a jack that allows it to be played on the television. Info & game list by: Segasonic3039