All set up works flawless .
Vol up down with phone 100% .
You could place bigger speakers just hold back because it is a tamiya .
Also get phone calls 🙈 okay sorry i used mono amplifier module 5vdc_ 9vdc reason space it has its own seperate volume just turn high use phone for control.
next the red laser mount this next upper turret .
Tested works perfect 5vdc
