---
title: Lookup
url: https://www.fastly.com/documentation/reference/compute/sdks/go/compute-sdk-go/device/fn.Lookup/
---

**Kind:** Function  
**Module:** [device](https://www.fastly.com/documentation/reference/compute/sdks/go/compute-sdk-go/device/)  
**Package:** compute-sdk-go v1.11.0  
**Source:** https://github.com/fastly/compute-sdk-go/blob/d6bf71b04516ed72d6018cab6fff701a865f86e5/device/device_detection.go#L55

```go
func Lookup(userAgent string) (Device, error)
```

**Parameters**

- `userAgent`: `string`

**Returns**

`(Device, error)`