Psion 7535 add-on docking module.
Psion Art.No.: HU4001 "Portable Docking Module". As kit with cables its also know as HU1005.
Charging: allows connection of power adapter.
Communication: two USB- and one serial port is provided.
Suitable for all Psion 7535 G1+G2 variants.
What you get: docking module only, no power adapter, no cables included. (it works without PSU).
Genuine Psion product, like new with 1 year warranty, ready to ship.