SHIMANO D Fly Di2 2 x Etube T Transmitter, Unisex Adult, Blue, One Size

Small wireless transmitter compatible with Dura-Ace and Ultegra Di2 systems Easily placed and emits data to the user's device, which can view real-time data from your training while pedaling Transmits data using an ANT wireless protocol Package weight: 0.04 kilograms