The 425 TTY features: 4-row keyboard with 50 easy-touch keys in a computer-style design; Special “GA/SK” keys; Turbo code for real-time conversations and Baudot code 45.5 baud; Interrupt capability in both Turbo Code and Baudot; Auto ID automatically alerts emergency services (and everyone you call) that you are calling by TTY; Bright 20-character display; NiCad rechargeable batteries and AC adapter (charger); One year warranty, with an optional extended warranty available.

The 425 is a basic printing TTY. Direct connect for keyboard dialing and auto-answer. Prints messages when you are unavailable. No memory for storage. Three different print sizes - normal, bold and wide.