[Home](./index.md) > [@firebase/analytics](./analytics.md) > [Item](./analytics.item.md) ## Item interface Item field used by some Analytics events. Signature: ```typescript export interface Item ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [affiliation?](./analytics.item.affiliation.md) | string | (Optional) | | [brand?](./analytics.item.brand.md) | string | (Optional) | | [category?](./analytics.item.category.md) | string | (Optional) | | [coupon?](./analytics.item.coupon.md) | string | (Optional) | | [creative\_name?](./analytics.item.creative_name.md) | string | (Optional) | | [creative\_slot?](./analytics.item.creative_slot.md) | string | (Optional) | | [discount?](./analytics.item.discount.md) | [Currency](./analytics.currency.md) | (Optional) | | [id?](./analytics.item.id.md) | string | (Optional) | | [index?](./analytics.item.index.md) | number | (Optional) | | [item\_brand?](./analytics.item.item_brand.md) | string | (Optional) | | [item\_category?](./analytics.item.item_category.md) | string | (Optional) | | [item\_category2?](./analytics.item.item_category2.md) | string | (Optional) | | [item\_category3?](./analytics.item.item_category3.md) | string | (Optional) | | [item\_category4?](./analytics.item.item_category4.md) | string | (Optional) | | [item\_category5?](./analytics.item.item_category5.md) | string | (Optional) | | [item\_id?](./analytics.item.item_id.md) | string | (Optional) | | [item\_list\_id?](./analytics.item.item_list_id.md) | string | (Optional) | | [item\_list\_name?](./analytics.item.item_list_name.md) | string | (Optional) | | [item\_name?](./analytics.item.item_name.md) | string | (Optional) | | [item\_variant?](./analytics.item.item_variant.md) | string | (Optional) | | [location\_id?](./analytics.item.location_id.md) | string | (Optional) | | [name?](./analytics.item.name.md) | string | (Optional) | | [price?](./analytics.item.price.md) | [Currency](./analytics.currency.md) | (Optional) | | [promotion\_id?](./analytics.item.promotion_id.md) | string | (Optional) | | [promotion\_name?](./analytics.item.promotion_name.md) | string | (Optional) | | [quantity?](./analytics.item.quantity.md) | number | (Optional) |