The Esys 24 (also known as the esys24) is a braille notetaker, refreshable braille display and braille keyboard designed for use by individuals who are blind or have low vision. This unit has a display with 24 braille cells with 24 integrated cursor routing keys located above the braille cells. The Esys 24 includes a ten-key braille keyboard with which the user types notes. The unit can be used independently or connected to a PC work station via Bluetooth or USB. It can also be used to send and read instant messages and operate a mobile phone or personal digital assistant (PDA). The user can use the two navigation joysticks located to the left and right of the braille line to control menus on devices using Microsoft Windows, Apple Macintosh or screen reader software; and the two lower front navigation wheels to browse through information. The Esys 24 can also be used as a notetaker with its built-in programming and micro SD card slot. Installed applications include Notepad, Agenda, Alarm Clock, Calculator and Tools. The esys24 is compatible with devices running many screen reader programs, including Jaws, Windows Eyes, Supernova, Cobra v.9.x or higher, Mobile Speak, Mobile Speak Pocket, Talks, and VoiceOver. A 2 gigabytes (GB) micro SD card is included. COMPATIBILITY: IBM PC or compatible or Apple Macintosh computers or iPod, iPhone and iPad. SYSTEM REQUIREMENTS: Microsoft Windows; Linux; Mac OS X; or iOS. POWER: Built-in lithium-ion rechargeable battery with USB charger (included). Operating time is up to 17 hours. DIMENSIONS (WxDxH): 23.3 x 9.4 x 2.2 centimeters. WEIGHT: 500 grams.