King Song included all of their latest features to make sure 18XL riders never left wanting more. Bluetooth connectivity and music streaming with built-in speaker system, Retractable push handle with robust construction means you can comfortably take your electric unicycle anywhere with you without needing to carry it, and it even has a built in sensor to automatically disengage the motor for those times you need to briefly lift your wheel over an obstacle or up a flight of stairs.