Can I define the camera settings manually?

No, all settings are controlled by the internal software on AirSelfie2. However, you can select under setting, selecting “picture” you have the option of Multiple shot mode or delay mode;
Multiple shot mode – will have the AirSelfie2 capture 3 or 5 shots at a time
Delay mode – will have the AirSelfie2 delay activating the camera for 3 seconds, 5 seconds or 10 seconds.