---
title: kIOVideoFeatureControlClassIDGain
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.12+]
path: kernel/1646200-anonymous/kiovideofeaturecontrolclassidgain
---

# kIOVideoFeatureControlClassIDGain

## Declaration

```occ
kIOVideoFeatureControlClassIDGain = 'gain'
```

## Discussion

Discussion A IOVideoFeatureControl that controls the amplification of the signal. The units for the control's absolute value are decibels (dB).