The Flex Screen is an item used by S.H.I.E.L.D. agents to send secret messages.
Discovering that HYDRA was attempting to create a weapon of mass destruction by duplicating the effects of the Obelisk, Jemma Simmons, S.H.I.E.L.D.'s mole in HYDRA Laboratories, sent a secret message via the flex screen to them. She spoke her message to the screen and put the screen in the trash can, as if it were refuge.
Bobbi Morse, head of security, and Sunil Bakshi found the flex screen and, with a security team, searched the desks of the employees. As Morse interrogated Simmons, Kenneth Turgeon was dragged away, since a flex screen was found in his desk.