The SRAM RED eTap rear derailleur executes shifts the instant you demand it, with military precision. Wirelessly. Wireless connection via AIREA network for fast and clean installation. Delightfully uncomplicated.
eTap batteries are literally a snap to remove and charge. Snap the battery into the USB powered charger and connect the charger to any USB power source or A/C USB adaptor. Incl. various power supply adapter.