Fan:Digivice (Quizardyokai)

A Digivice is a device for the a Digimon Tamer that allows their Digimon to digivolve and among many other features. In  Digimon Voyage Tamers were given their Digivices when they befriend a Digimon.

Origin
The Digivices were modeled after Calumon's ability to channel energy to digivolve Digimon. The card creating feature was added to have the Tamer be more involve in battle. On it's own the Digivice can only get the Digimon to their Ultimate forms, in order to get to Mega the Digimon must get outside help.

Digivolution
The main function the Digivice is to channel the Tamers emotions turning it into energy to allow their partners to Digivolve.

Champion
To have their partners digivolve to their Champion forms Tamers must have either strong emotions for their partners or have a fighting spirit.

Ultimate
To have their partners digivolve to their Ultimate forms Tamers must first activate their Crest by finding their own resolution which will align with their virtue (or vice).

Mega
For a Digimon partner to digivolve to their Mega forms they must first must be exposed to Calumon's Shining Digivolution and find their own resolution.

Armor
For a Digimon partner to digivolve to their Armor forms they must gain a Digi-Egg by showing that their virtues aligning with the egg.

DNA Evolution
With a Helix Loader a Tamer can have their partner perform DNA Evolution which involves two Digimon fusing into one.

Modification Cards
Tamers can use Modification Cards to give their Digimon partner boosts in battle. They can gain cards from a Digimon's loaded data.

Communication
Tamers can communicate with their partners and even other Tamers if they're close enough.

Radar
Digivices have radars that can detect other Digimon and Tamers at a 100 yard radius.