Wireless Di2 shifting designed for E-MTB and HYPERGLIDE+ compatibility. The durable Deore RD-M6260 long-cage 12-speed rear derailleur taps into proven wireless Di2 shifting technology and other strengths of the Deore Di2 groupset while pulling power from the bike's main battery via E-TUBE cable port. The cable delivers a stable power supply and connectivity with the drive unit eliminating the need to carry a separate back-up battery specifically for the rear derailleur. The RD-M6260 paired with the 10-51t cassette (cassette sold separate) delivers the range and features that all riders can appreciate.The Direct Wired RD-M6260-12 pulls power from your existing e-bike battery to deliver a constant supply of shiftsA wide link structure skid-plate design durable aluminum plate and solid pulley add robustness and longevityAutomatic Impact Recovery function instantly returns the derailleur to its original position after impactFeatures Shimano Shadow ES: A slimmer stronger evolution of Shimano's pioneering chain-stabilizing Shadow RD+ conceptAdded derailleur durability combined with a LINKGLIDE cassette (cassette sold separately) extends the drivetrain's lifespan Intelligent AUTO SHIFT E-Bike sensors and HYPERGLIDE+ technology provide smooth quick gear changes while you pedal so you are always in the right gearFREE SHIFT E-Bike technology allows you to shift as you coast on flats or downhills