After opening these OLUKAI Mens KuaAina Sandals, I couldnt believe how great they felt right out of the box. This is the only reason Ill be returning them. My visit extended from 10 minutes to an hour. Will not disappoint. Disappointing because I really liked them! USB charge cable is 31 inches long and AUX cable (red) was even longer at 39 inches. If you order PLEASE TRY IT ASAP so you still have recourse to return the item if its not functioning properly. The U4 units pair with each other almost immediately so you dont have to wait long before its active. Mount it on the middle set of of “holes” on the inside of the rail and you should be solid. This does, making for a much more comfortable and repeatable grip thats very easy to manipulate for consistent aim.