Shimano BT-DN300 Di2 Battery - Bow Cycle, Calgary, AB

Bicycling Catalog - Bow Cycle, Calgary, AB

Other - Bow Cycle, Calgary, AB

Derailleurs - Bow Cycle, Calgary, AB

The third port is for riders who seek the redundancy of Shimano's 12-speed Di2 wired option. - Compatible with thinner next generation electric wire

Shimano BT-DN300 Di2 Built-in Battery 3 SD300 Port BTDN300 for

Shimano BT-DN300 Di2 Battery 12-Speed – CCACHE

Bicycling Catalog - Bow Cycle, Calgary, AB

Electronics - Bow Cycle, Calgary, AB

Shimano BT DN300 Built in Di2 Battery

Bicycling Catalog - Bow Cycle, Calgary, AB

Other - Bow Cycle, Calgary, AB

Other - Bow Cycle, Calgary, AB

Accessories - Bow Cycle, Calgary, AB

Sport & Performance Road Bikes - Bow Cycle, Calgary, AB

Accessories - Bow Cycle, Calgary, AB

Parts & Accessories - Bow Cycle, Calgary, AB