[Home](./index.md) > [sip.js](./sip.js.md) > [SimpleUserMediaConstraints](./sip.js.simpleusermediaconstraints.md) > [audio](./sip.js.simpleusermediaconstraints.audio.md) ## SimpleUserMediaConstraints.audio property If true, offer and answer to send and receive audio. Signature: ```typescript audio: boolean; ```