Hi Guys.
Just come across this. Probably common knowledge to a lot of you but Just thought I’d share it?
I know we’ve got the find my drone feature on the dji go4 app but this little thing could be handy.
http://www.nichemall.net/index.php?route=product/product&product_id=50
That’s a new one on me!
What is it?! Some kind of audible alarm to help you find a lost drone?
Yeah has a motion senser in it. After 30 seconds it will beep pretty load at cha. Will be for good couple hours.
Looking at the clip on the link you can change the time that it goes off to minutes which is handy. Would be annoying if your hovering for 30 seconds and the bugger goes off on you. 
Yeah I was just wondering how it knows when to start sounding?!