Surface Accessory Device (v2.0.287.0) update improves sleep state transitions when a Surface Cover is attached.

Surface Pro System Aggregator Firmware (v2.4.350.0) update improves sleep state transitions when a Surface Cover is attached.

Surface Pro UEFI update also provides support for PXE boot with the new Surface Ethernet Adapter.

Surface Pro UEFI (v2.4.950.0) and Surface Pro Embedded Controller Firmware (v24.1.50.0) updates enhance system stability with microSD products, improves compatibility with Power Cover, and increases the reliability of sleep state transitions.

Specifically, the June Surface Pro 2 firmware updates included: Surface Pro 2 users got a handful of updates designed to improve power/sleep functionality, BitLocker support, Miracast support and more. The June updates were the first new firmware for the second-generation Surfaces to be released by the company since March 2014.

The company didn't release any new firmware for its first-generation Surface RT or Surface Pro models today. As part of today's June 10 Patch Tuesday, Microsoft has made available firmware updates for its second-generation Intel-based Surface Pro 2 and ARM-based Surface 2 tablets.

Surface pro 2 manual