Restraint Chair (older US model pictured left)

Technical Info:
Various models exist.
US models tend to have straps, cuffs or material restraints at wrists, ankles, waist, chest or shoulders.
Chinese models tend to be in the style of a child's high chair with metal handcuffs and leg restraints attaching the subject to a chair with a lockable metal table or tray.

Lack of independent testing.
Danger occurs when the subject is left unattended, restrained for prolonged periods, or when additional force is used such as the use of electric shock equipment or chemical irritants. Additional danger occurs if the subject is restrained whilst under the influence of drugs or alcohol.
Can (but shouldn’t) be used as a punishment.
No legitimate law enforcement use that cannot be effectively accomplished with safer alternatives therefore their use in law enforcement should be prohibted as should the corresponding production and transfer.

Associated Images:
مقعد لتقييد المعتقل فيه
Chaise d'immobilisation
Смирительный стул
Silla de inmovilización