It is a Phone mount that connects to kitesurfing board handle with the standats borad handle of SELECT DUTOUNE 2020 board. (can be used with Surfr app to measure your jumps height)
May be it will fit also rest of dutoune twintip boards of all years.. and also NORTH board, since the handles didn't change to mush over the years.
Put your phone inside waterproof bag(see attached image)and than slide it under the rubber band( like in the image)
video:https://drive.google.com/file/d/1y-0cvbunEOBVWK0KipVd0ei_rvyEwztt/view?usp=sharing
you will only need to add rubber band and maybe wrap it twice in order to generate tension to hold the phone
max size of the phone can be: 1.4cm*17.5cm*8.5cm (6.7inch screen)