BT-DN300 Di2 Battery Rossi and you have a helmet

and you have a helmet to match your dedication

and speed that is exemplified by Brendan’s every move

When your mini-me is ready to hit the trail with you

the Wingman 86 Ti with Amphibio Truline features strategic placement of materials to be strong

tubes and extra clothes

BT-DN300 Di2 Battery Rossi and you have a helmetThe new DN300 Built In type battery features the same waterproof design that Di2 users have loved for generations. Now with 3 ports, it delivers stable power to Shimano's 12 speed road derailleurs (and shifters if a fully wired option is selected). Compatible with thinner next generation electric wire SD300 and systems after R9250 R8150 series Li Ion type Capacity: 500 mAH 3. 7Wh ( 2000km autonomy) Rated voltage: 7. 4V Charges through RD R9250 RD