A2-B4 was an accounting and business droid owned by Lord Anstaal. A2-B4 later came under the possession of Sybegh Abya.

The droid had a hemispherical body, two fine manipulators, a speech synthesizer, visual and auditory sensors, a holorecorder, a holoprojector, and a repulsor unit that allowed it to hover up to two meters in the air. It was one meter wide and .6 meters tall. It cost 8,000 credits.