//[docs](../../../index.md)/[dev.inmo.tgbotapi.types.files](../index.md)/[VoiceFile](index.md)/[duration](duration.md)



# duration  
[common]  
Content  
open override val [duration](duration.md): [Long](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-long/index.html)? = null