It includes the following Firmware Updates for Surface Pro 3 :
- Surface Pro UEFI update (v3.11.950.0) adds support for new features in Windows 10.
- Wireless Network Controller and Bluetooth driver update (v15.68.3091.193) improves the system stability and the Wi-Fi connectivity experience, also increases the network download performance.
- SATA AHCI Controller driver update (v126.96.36.1998) stabilizes deployment methodology on Surface Pro 3.
These updates will be installed via Windows Update. Firmware updates cannot be uninstalled or reverted to an earlier version.
Details are Here