Product Description The BM-DN100 Di2 battery mount by Shimano enables wireless communication. It is much more than just a mount - as a master unit it has Bluetooth and thus establishes a wireless connection between a separately available wireless unit (e.g. SC-MT800, EW-WU101) and a tablet or smartphone. This is perfect for quick adjustment on the road or for detailed analysis in the workshop. The BM-DN100 was specially designed for the external battery SM-BTR1, which (unlike the BT-DN110) is not Bluetooth-compatible itself. There are three different versions: a long mount for external cable routing, a long mount for internal cable routing and a short mount for external or internal cable routing. Mounting material is supplied. Information regarding the return of batteries and electrical equipment: Information on the return and disposal of batteries and electrical equipment can be found here. Technical Information: Number of E-Tube Ports: 1 Number of E-Tube Connections: 0 Models: long or short Mount: bolts Cable Routing: external or internal (EW-SD50) Compatibility: Dura-Ace Di2 9070 Dura-Ace Di2 R9150 Ultegra Di2 6870 Ultegra Di2 R8050 GRX Di2 RX815 Alfine/Nexus Di2* XTR Di2 M9050 XT Di2 M8050 * only in conjunction with SC-MT800, not SC-S705 Features: mount for external battery SM-BTR1 Bluetooth LE compatible (Master Unit) E-Tube project ensures firmware updates Models: external/internal short: Battery Mount Type: short Cable Routing: external or internal Manufacturer Number: I-BMDN100S1 external long: Battery Mount Type: long Cable Routing: external Manufacturer Number: I-BMDN100LB internal long: Battery Mount Type: long Cable Routing: internal Manufacturer Number: I-BMDN100IB Contents: 1 x Shimano Di2 BM-DN100 battery mount external long version: 1 x bolt, 1 x cable tie, 3 x washers internal long version: 1 x bolt, 1 x cable tie, 3 x spacers, 3 x washers, 2 x cable covers external / internal short version: 2 x bolts Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com