When you choose this school at 2nd level, you can replace your spellbook with a spellreader, a technomantic device capable of storing magical data. If you lose this device, you can spend an hour transforming another storage device into your spellreader. The time and gold you must spend to copy a technomancy spell into your spellreader for you is halved.
You also learn the Message cantrip, which doesn't count against your current number of cantrips known. If you already know this cantrip, you learn a different wizard cantrip of your choice. When you cast Message, its range becomes 1000 feet.