Used but in great working condition. 160Wh capacity delivers up to one additional hour of riding. Compatible with Turbo SL Bikes. Includes a 3 LED charge-level indicator. Compatible with all Specialized SL Turbo bikes. You will need to order the correct lengthcable for your bike though. Details found here: https://www.specialized.com/us/en/sl-range-extender-battery/p/173733?color=273576-173733&searchText=98920-5640