This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The transferOut() method of the USBDevice interface returns a promise that resolves with a USBTransferOutResult when bulk or interrupt data is transmitted from the USB device.


var promise = USBDevice.transferOut(endpointNumber, data)


The number of a device-specific endpoint (buffer).
A variable to hold the data returned by the transfer.

Return value

A promise that resolves with a USBTransferOutResult.


Specification Status Comment
The definition of 'transferOut()' in that specification.
Draft Initial definition.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic support
Chrome Full support 61Edge No support NoFirefox No support NoIE No support NoOpera Full support 48Safari No support NoWebView Android No support NoChrome Android Full support 61Edge Mobile No support NoFirefox Android No support NoOpera Android Full support 48Safari iOS No support NoSamsung Internet Android No support No


Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

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Contributors to this page: mdnwebdocs-bot, jpmedley
Last updated by: mdnwebdocs-bot,