SHIMANO Dura-Ace Di2 TT / Traiathlon models
https://alexscycle.com/products/shimano-dura-ace-di2-sw-r9160-tt-traiathlon-bar-end-shift-switch
https://alexscycle.com/products/shimano-dura-ace-st-r9160-di2-tt-shifter-brake-lever-set