Here is what I did.
Drill approx 7mm under the top line , just on the right side of the left bottom button.
You 'll see the speacker just behind.
Put the screw in that hole, aiming to the center of the speaker.
Then, make your RC beeping and screw/unscrew to set the volume you need.
After that, I applied a touch of araldite around the screw head to avoid water or humidity to go inside.
It works really fine, really !!
You can also adjust the volume depending of your flight environnent, to be sure to ear warnings in a noisy environnent, or to avoid disturbing nature or people around in a silent place...
![IMG_20190501_174124.jpeg IMG_20190501_174124.jpeg](https://mavicpilots.com/data/attachments/71/71166-80b62bcab3b52716dcda2e175757e288.jpg?hash=gLYryrO1Jx)