Krown TDD with printer Comes with Fast Type for a real timeconversation Fast Type speed goes to 110 baud for a professional typist or automatically go back down to 45.5 baud American standard , if the otherTTY doesn't have the same feature. With interrupt function, conversation with Fast Type will be more natural than the regular Baudot. It's supportedby most of States Relay services 20 Character display 24 Column printer with three print sizes 32K Memory TTY call alert Separate on/off printer switch Built in help menu Four message buffers Upper and lower case printing Replaceable heavy duty rechargeable battery Acoustic cups to fit round and square handsets Electronic voice Keyboard dialing Memory dialing Tone and pulse dialing Built in directory Dual modular jacks Auto answer Remote message retrieval Visual display of dial tone, busy, and ring Built in clock and calendar Interrupt Programmable relay number Box dimensions 18L x 11W x 4D KRNMP2000D