Bike holder for "MPow Armor" bluetooth speaker

This is a bike holder for my bluetooth speaker "MPow Armor". The clamp is designed for a handlebar porch with 35 mm diameter and one layer of tape within. The speaker fits strange in the holder with additional hook&loop fixation, slots for these are inside the holder. The clamp A and B are put together with a screw M3 x 25 and nut, for clamping I have melted a nut M4 in clamp A (with a soldering iron) and a screw M4 x 30 in clamp B. Holder and clamp are fixed with M4 screws.