Had speaker system installed inside and outside of vehicle, with outside speakers that light up. installed lights for the in side of the vehicle installed floor wrap mats for the floor to keep the inside cool in the summertime from the heat of the engine. I have 2 helmets. one for the driver and one for the passenger. installed phone holder for the phone. it cannot be removed.installed valve stem lights thy light up at night as you are driving rotating lights. have minor damage to one of the front rims. I will take $500.00 off the sale of the Slingshot.