PrepStation Pro 4 it supports Di2 systems with

it supports Di2 systems with internal wiring and junction box housing

Only compatible with Shimano XTR 9000 or 9020 cranksets

This 8-speed chain meets durability requirements for e-bike use when used with a pressed-in pin instead of the included 'quick-link

with no sharp edges or chamfers which yields a significant reduction in noise

That is what makes it especially suitable for e-bikes and other heavy bicycles

PrepStation Pro 4 it supports Di2 systems withToPeak PrepStation Pro Tool Kits 55 Professional level Tools fit nicely into foam fitting swing out trays Plenty of extra storage capacity for small parts in top trays, cleaning and lube supplies in base 5 Ball Bearing Wheels and folding handle for easy transport