Dragon Ball Wiki

The Let's! TV Play is a series of Japan-only plug-and-play devices distributed by Bandai. They are self-contained gaming systems which hook up to a television set via audio-video cables.

Several Let's! TV Play games based on the Dragon Ball series were released between 2006 and 2008:

The Let's! TV Play: Dragon Ball games are rail shooter/first-person fighting games played with a pair of wireless devices that slip around the ends of fingers: the Dragon Band. Using the Dragon Band, the player can throw punches, ki blasts, block or brush away incoming attacks, and even do classic moves like the Kamehameha by making the appropriate hand motions.

The storymode is very basic and does not include every saga that dragon ball z has to offer the game has 5 stages  and each stage starts with a pre-lude where you battle against the infamous saibamen, or Frieza soldiers.

it proceeds with a mini boss such as Nappa or Cell Jr. and ends with a boss fight. completing the boss fights can be very hard, because  in typical on rail shooter fashion, when you die... you die...

In between stages you will find various minigames such as climbing korin's tower, catching senzubeans & taking out as many saibamen as you can

Gameplay is about 40 minutes long and will add up if you replay the game with the unlockable characters the graphics are a mixture of sprited characters and a 3d background, but hey at least it's widescreen right!

An American device by Jakks Pacific uses a similar plug & play concept, the Dragon Ball Z TV game released in 2006. A similar control scheme to the Let's! TV Play series of games is used in the Budokai Tenkaichi games on the Nintendo Wii.