The B920 Two-line Alphanumeric Keypad (SDI2) from Bosch is a SDI2 bus compatible device. Each keypad has user adjustable options such as volume and display brightness. The B920 shows two-line system messages for all areas. Key Features: 2-line LCD display with up to 32 character point, user, and area names Simple menu-style user interface with dedicated function buttons for common commands, including status indication Situation sensitive on-screen help makes system operation simple and easy Highly visible on (arm)/alarm, ready to turn on (arm), power and gas alarm indicators Simple installation with self-locking base and chassis design, plus built-in bubble level SYSTEM OVERVIEW: For commercial use, install the keypad in building entrances and areas with unrestricted access. Mounting a keypad near exterior doors in hotel or business lobbies allows people to identify the type and location of the emergency. For residential use, install the keypad near the front and rear entrances to the home. Install additional keypads in a kitchen or in a bedroom. Use multiple keypads in a large building with many separate areas of security. Program multiple keypads to control multiple areas. Audible tones from the keypad sounder alert personnel to fire events and assist fire fighters in locating the keypad.