- Jail/Prison/Patient/Visitation Phone. Constructed of rugged, durable 14-gauge stainless steel - Constructed of rugged, durable 14-gauge stainless steel - Large, stainless steel ADA keypad - Adjustable volume button - Large customizable instruction card area - Tamper-resistant locking system - Built-in mounting plate designed for fast, easy installation - The mounting plate includes a gasket that prevents moisture from entering the phone - Oversized line-wire entrance hole with moisture-preventing gasket