The Audio can be transmitted up to 400 meters, in the DJI Mimo app, you can set the transmitter and receiver to automatically power off after a period of inactivity. When this feature is enabled on both devices, they will automatically shut down if not connected for more than 15 minutes. The transmitter automatically enters sleep mode when it doesn’t detect a signal from the receiver. Just five minutes of charging provides about one hour of use for both the receiver and transmitter, significantly enhancing charging efficiency. A fully charged case provides approximately 3.6 full charges to achieve a total of 48 hours of extended use. The receiver is compatible with cameras, smartphones, computers, and tablets.The DJI Mic Mini is compatible with the DJI Neo drone.