- An air gun designed to silence talking students.
- A laser grid cutting off access to the vents.
- A password protected door whose code is changed regularly.
- A signal jamming device.
- Biffy Goldstein was later able to work out a system to bypass the jamming device.
In spite of Barrage's boasts that the detention room is now impregnable Lee has been able to break out on a few occasions. However, every time he has done so, he was released by a friend on the outside.
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