The volume level depends on two things: the input volume and the headphone volume. Use the volume controls on the device your MEE audio Connect Air is plugged into, such as the in-flight entertainment system, to adjust the input volume (for example with an in-flight entertainment system, you can raise the volume using the on-screen or remote control). The headphone volume is adjusted using the volume controls on the headphones. In the case of AirPods, because there are no built-in volume controls, if adjusting the input volume does not provide sufficient volume, you can adjust the base volume of the AirPods by connecting them to your iPhone or iPad, increasing or decreasing the volume, and then connecting them back to the MEE audio Connect Air transmitter.