Our intention with Reverb AXS™ was inventive and pure: No hoses. No routing. No energy wasted. Not a single thing in the way of the experience. We created a reliable wireless-electronic dropper post and controller that actuates with drastically less effort and zero distraction. Expanding what\'s possible on a bike, Reverb AXS™ is enabled by SRAM AXS™ technology, a new level of interaction, personalization, and connectivity across all AXS™ enabled components. FEATURES Effortless Electronic-Wireless actuation and infinite height adjustment with a single touch. Clean, simple and fast to install. No hoses to route, no fishing required. Updated internals for faster return speed in all conditions. New Vent Valve Technology, a simple and reliable built in service solution without disassembly of the seatpost. SRAM AXS™ technology, a new level of interaction, personalization, and connectivity across all AXS™ enabled components. Includes RockShox AXS™ handlebar controller, rechargeable SRAM battery and charger. Compatible with 7mm round rails and 7x9mm oval rails.