These 2 button TT/Tri shifters from Shimano let you literally extend your Dura-Ace or Ultegra Di2 shifting functions by adding additional shift controls to the ends of your aero extension bars. You get the same, effortless, push-button shifting as you do from your Dual Control levers without having to leave your aerodynamic position. The Shimano Ultegra Di2 SW-R671 11-speed TT/Tri shifters fit into the ends of your aerobar extensions and are compatible with Dura-Ace Di2 11-speed systems as well as Ultegra Di2 10-speed and 11-Speed E-tube electronics. Features: ~Fast, smooth, precise and effortless shifting at the touch of a button ~Change gears from your aero extensions or Di2 Dual Control brake levers ~Compatible with Dura-Ace 9070 11-speed and Ultegra Di2 10-speed and 11-Speed E-tube electronics systems ~Compatible with Shimano's FlightDeck computer ~95g per pair ~Not compatible with Dura-Ace 7970 Di2 systems ~SW-R671 2-button TT/Tri shifter set have 600mm length built-in E-tube wires, controls front and rear derailleurs ~Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/ ~All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions Installment Plan 6 Months RM110 / 12 Months RM55 (Credit card Public bank and Maybank only) FREE POST (100% ORIGINAL PACKAGE) Whatsapp - http://VKcyclespuchong.wasap.my Call - 012 6960321 Vince Email - vkcyclespuchong@gmail.com ------------------------------------------------------------- Shop Area Bukit Puchong, Nearly Tesco and bukit puchong Gallery. VK CYCLES Map - https://goo.gl/maps/8y79tAyzkEE2 (Location) No 39, Jalan BP 7/2, Bandar Bukit Puchong, 47100, Sealngor, Puchong. Operation Hour Tuesday to Sunday 10:30 To 20:00 https://shopee.com.my/vkcyclespuchong (online shop) Facebook - https://www.facebook.com/SpecialistRepairBicycles/ Instagram - VK Cycles VK CYCLES TRADING 512772520982 MAYBANK (SA0485656U) After banking please snap receipt, after full address detail. (Whatsapp / Call)