|This article is about an changer in Denji Sentai Megaranger.|
|Used by: MegaSilver|
|Produced by: Professor Eikichi Kubota|
The Keitaizer (ケイタイザー Keitaizā) is a flip cellular phone device that MegaSilver used to transform. To transform, he pressed a button on the side to open the flip covers, then he pressed 2 (M) + 5 (E) + 8 (G) + 0 (A) and pressed the arrow button which meant 'Enter'. Red letters flashed 'Mega' on the round screen. It uses many of the same features as the Digitizer (but with MegaSilver's own unique vehicles) and is also used as an actual cell-phone. The device's name is actually a play off of "Keitai Denwa", or "cellular phone".
- 2580 - MEGA: Ranger transformation. (Transformation call is "Keitaizer, install!" (「ケイタイザー、インストール ！」 "Keitaizā, insutōru!"))
- 259: Calls Auto Slider.
- 148: Activates MegaSilver's scanner (computer icon).
- 506: Alerts MegaSilver (sound icon).
- 730: Plays the Megaranger theme song.
At the climax of the Legend War, the Keitaizer was made redundant when MegaSilver sacrificed his powers with the rest of the first 34 Super Sentai to destroy the invasion force of the Space Empire Zangyack. Resurfacing a Ranger Key, the power of MegaSilver would be used by the Gokaigers to assume the form via the Gokai Change. Ultimately, the Gokaigers returned their borrowed powers to their rightful owners after overthrowing Zangyack.
- The Keitaizer is the first cell-phone based transformation device in Sentai history. This would become a common motif of Sentai transformation devices with many of the teams of the 2000s.
- Its usage would also be utilized by the transformation belts in Kamen Rider 555.