The Odyssey 3000 (Model 7508) dedicated console was released in 1977. The 3000 features the same game variations as the Odyssey 2000 (Tennis, Hockey, Smash) as well as Basketball, Soccer, and Gridball (a game where the player must skillfully navigate a ball through a series of barricades). The unit is set up for two players, but a solo-play Practice mode is available for both Smash and Basketball. A three-position handicap switch allows players to set skill level, and additional controls allow players to select automatic or manual serve, ball speed, and ball deflection angle (20 or 40 degrees). With the Odyssey 3000, Magnavox abandoned its old case design with one with a more contemporary style. The console itself is more angular and less rounded; two flat buttons are used for the serve and reset functions and the console settings knobs were reduced in size. The Odyssey 3000 uses a flat circular knob for selecting different games and unlike all previous Odyssey dedicated video game consoles, the 3000 features detachable game paddles (without any fire buttons). The 3000 is powered by either six "C" batteries or an optional AC adapter.
Source: Wikipedia, "[en.wikipedia.org/wiki/Magnavox_Odyssey_series%23Odyssey_3000 Magnavox Odyssey series]", available under the CC-BY-SA License.