|This article is about a/an transformation device in Kamen Rider Den-O.|
The Transformation Belt Den-O Belt (変身ベルト デンオウベルト Henshin Beruto Den'ō Beruto) is Kamen Rider Den-O's means of transformation. It is affixed with a device known as the SetTouch (セタッチ Setacchi) in the Terminal Buckle (ターミナルバックル Tāminaru Bakkuru), which can read a Rider Pass (ライダーパス Raidā Pasu) and recognize the Imagin user. When the Rider Pass is swiped across the SetTouch, a transformation along with multiple form changes can occur. The belt has four buttons (red, blue, yellow, purple), each activating a specific form (Sword, Rod, Axe, Gun), known as the Form Switch (フォームスイッチ Fōmu Suicchi). It is also used to activate the primary finisher, Full Charge (フルチャージ Furu Chāji). Sieg uses an alternate form of the Den-O Belt named the Wing Buckle (ウイングバックル Uingu Bakkuru), which features a gold winged plate instead of the Terminal Buckle and is used to transform into Wing Form.
An Imagin can use the Den-O Belt to transform to their specific Rider Form provided they do not need a host (meaning they have a physical form) and have a belt and pass available.
Plat Form is activated by swiping the Rider Pass over the SetTouch, similar to the suica system. Imagin form changes are activated by pressing the corresponding button and swiping the Rider Pass over the SetTouch. Wing Form uses the Wong Buckle, which only has one button that can be pressed. Accessing Climax Form instead uses the K-Taros, which is attached to the Den-O Belt after initiating a transformation. Liner Form is accessed by using the DenKamen Sword instead. To perform finishers Den-O swipes the Rider Pass over the SetTouch again while transformed.
- The Den-O Belt is also donned by Erika Yoshizumi of Kamen Rider Girls, who represents Den-O in the group.