RockShox Reverb AXS Seatpost 34.9 100mm A2

Sram's 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. Sram 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 / Options: 

• NEW Features Vent Valve Technology for super simple service if the need arises without any disassembly of the post
• NEW Lower friction IFP allows for faster actuation of the post and less force needed
• AXS Technology allowing for customization to an individual rider’s liking via the AXS Mobile App
• SRAM AXS compatible controller sold separately.
• Shared battery with all other SRAM AXS enabled components
• System is completely waterproof to IPX7 rating
• Compatible with 7mm round rails and 7x9mm oval rails
• 34.9
• 100mm 

More info at Sram.com