KS Rage Circuit Wireless Dropper Seatpost. Features: Easy Bluetooth pairing with included remote Auto wake-up ensures immediate, no lag actuation New internals designed with hydraulic valves at the top of the post User adjustable air pressure accessed at the base of the post Removable and rechargable 450mAh lithium battery Typical battery charging cycles under normal use is up 9000 times Typical charging time: 4-4.5 hours Battery and charger are included(replacement battery LT8011) Waterproof factor IP67 Saddle clamp options compatible with 7x9 oval carbon rails Specs: Model:Rage Circuit Travel Drop:120mm Diameter:30.9mm Length:385mm Weight:- Color:Black