# TRTCSystemVolumeTypeVOIP property Null safety

int TRTCSystemVolumeTypeVOIP
final

The call volume mode will be always used, which is suitable for conferencing scenarios. If the scenario you select during `enterRoom` is `TRTC_APP_SCENE_VIDEOCALL` or `TRTC_APP_SCENE_AUDIOCALL`, the SDK will automatically select this mode.

## Implementation

    /// If the scenario you select during `enterRoom` is `TRTC_APP_SCENE_VIDEOCALL` or `TRTC_APP_SCENE_AUDIOCALL`, the SDK will automatically select this mode.
    static final int TRTCSystemVolumeTypeVOIP = 2;