---
title: wTransferSize
framework: kernel
role: symbol
role_heading: Instance Property
path: kernel/iousbdfudescriptor/1546379-wtransfersize
---

# wTransferSize

The maximum number of bytes that the device can accept per control-write transaction.

## Declaration

```occ
uint16_t wTransferSize;
```

## See Also

### Getting the Properties

- [bLength](kernel/iousbdfudescriptor/1546015-blength.md)
- [bDescriptorType](kernel/iousbdfudescriptor/1546426-bdescriptortype.md)
- [bmAttributes](kernel/iousbdfudescriptor/1546360-bmattributes.md)
- [wDetachTimeout](kernel/iousbdfudescriptor/1546084-wdetachtimeout.md)