Designed around a PAM8403 circuit from Aliexpress and a USB socket, this unit plugs into the 3.5mm jack socket (remember them!) of your smartphone and holds the phone.
The side profile was copied from the IKEA Bergenes Bamboo phone stand, using the larger of it's 2 slots.
Base was printed in Creality Ender-PLA at 200/60°C with 0.2mm layer and 20% infill. Lid was printed in eSun PLA-SS Fire Engine Red at 220/60°C, 0.2mm layer and 20% infill.
Lid and base are then screwed together. The hex form window I thought was a nice feature to expose the electronics within.
The author marked this model as their own original creation.