Here's what they say:
Off-World Vol. 1: Cinematic pitch bends sources from an ancient Vietnamese monochord, processed through octave pedals, distortion and reverb, mapped in a bespoke Kontakt engine. It also comes with all the dry samples mapped in the engine, for users who prefer to do their own sound design.
The Harmonium: A deep sampled and very realistic 110 year old pump organ. What sets this instrument apart is the comprehensive sampling of all the extraneous noises; the clunk of the key bed, the sound of the foot pump and even the sounds of pulling the stops in and out - and using the FX matrix this virtual instrument becomes much more than just a virtual recreation of the real instrument.
Both instruments require the full version of Kontakt 5.7.3 or later.