Microprocessor
* 68030, running at 33 MHz.
Address and Data Bus
32-bit Address Bus
32-bit Data Bus
Memory
* Comes with 4MB low-power DRAM on the logic board.
* Expands to up to 24MB by installing Macintosh PowerBook Duo 4MB or 8MB Memory Expansion Kits or larger-capacity third-party memory expansion cards in the expansion slots
Disk storage
* One internal 80MB or 120MB hard disk with 19 ms access time.
Display
* 9 in. (229 mm) diagonal.
* Bright backlit Supertwist liquid crystal display.
* 16-level gray scale, 640 by 400 pixels.
Battery
* Nickel-metal hydride, provides approximately 2 to 4.5 hours of use before recharging is necessary.
* Recharge time: about 2 hrs. recharged standalone in computer.
Keyboard
* Built-in keyboard with standard Macintosh layout.
* Two-level tilt adjustment.
* LED shows when caps lock key is engaged.
Trackball
* 19-mm-diameter, dual-button trackball.
Interfaces
* One 152-pin PDS connector for attaching a Macintosh Duo Dock, Macintosh Duo MiniDock, Macintosh PowerBook Duo Floppy Adapter, or other expansion device.
* One RS-422 serial port for printer, modem, or other serial device.
* One RJ-11 Port for optional internal modem.
* One power adapter port.
File transfer options
* LocalTalk cables and System 7 file sharing.
* Serial cable and System 7 file sharing.
* Fax/data modem and AppleTalk Remote Access software.
* With Duo MiniDock: External Apple SuperDrive, SCSI Disk Adapter, and HDI-30 SCSI System Cable for external hard drives.
* With Duo Dock: Internal Apple SuperDrive, optional internal hard drive, and HDI-30 SCSI System Cable for external hard drive.
Modem
Optional internal Macintosh PowerBook Express modem; 14,400 bits per second (bps) data with fax send and receive at 9600 bps.
Includes Express Fax software:
* Hardware supports V.32bis, CCITT, and Bell standards.
* Software supports CCITT standard V.42 and V.42bis (for up to 57,000 bps effective throughput), MNP 2-5.
* Supports standard Hayes AT command set.
Microphone (built-in)
* Internal electret, omnidirectional.
Sound
* Built-in speaker.
* Monophonic 8-bit sound, capable of supplying the same signal to both channels of stereo headphones or other stereo equipment through the sound jack.
* 8-bit sound output, sampled at 11 or 22 kHz.
Disability access
CloseView, Easy Access, and visible beep are included with system software. These built-in solutions and third-party options provide alternative input and output devices for people with disabilities.
Size and weight
* Height: 8.5 in. (21.6 cm)
* Width: 10.9 in. (27.7 cm)
* Thickness: 1.4 in. (3.6 cm)
* Weight: 4.2 lb. (1.9 kg)
Electrical requirements
* Line voltage: 100 to 240 V
* Frequency: 50 to 60 Hz
Environmental requirements
* Operating temperature: 50í F to 104í F (10í C to 40í C)
* Storage Temperature: -40 to 65í C (-40 to 148í F)
* Relative humidity: 20% to 95% noncondensing
* Altitude: 0 to 15,000 ft. (0 to 4722 m)
* Operating altitude: 0 to 10,000 ft.(0 to 3048 m)