The PowerBook G4 12-inch featured a 1.33 GHz PowerPC 7447a (G4) processor, 256 MB of DDR SDRAM, a 60 GB Ultra ATA/100 hard drive (4200 RPM), a slot-loading 8X Combo drive or a 4X SuperDrive, and Bluetooth 1.1/AirPort Extreme (802.11g). The case was made of an aluminum alloy. The 12.1-inch TFT XGA display was 1024×768 pixels. The small size offered considerable computing power in a highly mobile package.
The PowerBook G4 1.33 was similar to its predecessor (PowerBook G4/1.0 12-inch), but had a new logic board design and faster performance.