It can separate into the Prism Sword & Bicker Shield.
When the Trigger Memory is placed in the Maximum Slot on the Trigger Magnum, it shifts from Normal Mode to Maximum Mode to enable either the Trigger Full Burst (LunaTrigger), Trigger Explosion (HeatTrigger) or Trigger Aerobuster (CycloneTrigger) Maximum Drives.
As long as the Double Driver is worn by both Simon & Charlie, they can telepathically communicate with each other provided that both of them are conscious outside the transformation to Double Detective. During the final battle with the Utopia Dopant, Double Detective CycloneJokerXtreme places the Prism Memory in the Maximum Slot to execute the Double Prism Xtreme Maximum Drive. In other forms, it can be used to insert the right half's Memory, allowing for a Twin Maximum attack, but this is immensely dangerous due to the strain it puts on Simon's body. This specific slot is used for the Joker Memory to execute either the Joker Extreme (CycloneJoker), Joker Grenade (HeatJoker), or Joker Strange (LunaJoker) Maximum Drives. When a Memory is placed in the Maximum Slot, Double Detective can use a Maximum Drive finisher attack. Another slot on the right side of the Double Driver is called the Maximum Slot. When Charlie puts a Gaia Memory into the Right Slot, he undergoes Soul Forward, sending his soul to Simon to transform both of them into Kamen Rider Double Detective.
The Left Slot holds Simon's Gaia Memories & the Right Slot holds Charlie's. By inserting the Gaia Memories into the respective Memory Slots on their belt buckles, Simon & Charlie can transform into Double Detective. There is only one, physical, Double Driver, but when Simon places it on him, another Double Driver manifests itself onto Charlie. Unlike earlier models, the Double Driver uses two Gaia Memories at once for even more power for the user.