Switchboard Key

3-1 Research Facility - Detention Center, Jake's route: dropped by the last J'avo you kill in your cell at the start of the chapter. Jake is unarmed: charged punches and ground finishers.

Use it on the switchboard box on the wall: it cuts the power and Jake and Sherry get out of their cells.

Long split: Jake stays unarmed through the machinery room and reaches the camera booth (cameras 1 and 3 have guns) to cover Sherry; she sneaks past patrols on a route with no items at all. Jake enters the code at terminal 2, Sherry at terminals 3 and 4.