What app do u use for this c

Hello, we use the Bluetooth App named Magic LED.

Are they waterproof & could you have them on the outside or your vehicle??

Hello, Thanks for you inquiry. Yes, the emlem can have them on outside of the vehicle, it's waterproof rate is IP67.

How do you mount these?

Hello, there is double-sided tape behind the cummins emblem, you could stick it directly.