[Home](./index.md) > [sip.js](./sip.js.md) > [SubscriberOptions](./sip.js.subscriberoptions.md) ## SubscriberOptions interface Options for [Subscriber](./sip.js.subscriber.md) constructor. Signature: ```typescript export interface SubscriberOptions extends SubscriptionOptions ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [body](./sip.js.subscriberoptions.body.md) | string | | | [contentType](./sip.js.subscriberoptions.contenttype.md) | string | | | [expires](./sip.js.subscriberoptions.expires.md) | number | | | [extraHeaders](./sip.js.subscriberoptions.extraheaders.md) | Array<string> | |