Here's what Microsoft changed in last week's Surface Pro 4 firmware update

Microsoft updated the Surface Pro 4 last week with a previously undocumented firmware update, the firm has now detailed the changes on the Surface update page.

If you don’t own a Surface, you might find some of this information boring, so we’ll just run through the highlights. Most of the updates are fairly pedestrian, with updates to core functionality like the pen, system stability, and conforming with EU regulations for Surfaces sold and operated in the European Union. Most importantly, Microsoft added a power slider for users who want to have fine-grained control over their Surface’s battery life, especially when you’re on the road without access to power outlets.

Here’s the full changelog:

• Marvell AVASTAR Bluetooth Radio Adapter – Bluetooth  – 15.68.9114.29 implements changes to meet EU regulatory requirements.
• Intel(R) Iris(TM) Graphics 540 – Display adapters – 21.20.16.4627 improves DX12 and power performance.
• Surface Embedded Controller Firmware – Firmware – 103.1744.256.0 improves system stability.
• Surface Management Engine – Firmware – 11.6.25.1229 improves system stability.
• Surface UEFI – Firmware – 107.1741.768.0 improves Wi-Fi performance when waking from sleep.
• Marvell AVASTAR Wireless-AC Network Controller – Network adapter – 15.68.9114.29 implements changes to meet EU regulatory requirements.
• Intel(R) Smart Sound Technology (Intel(R) SST) Audio Controller – System devices – 9.21.0.2102 improves video performance in some applications.
• Intel(R) Smart Sound Technology (Intel(R) SST) OED – System devices-  9.21.0.2102 improves video performance in some applications.
• Surface Accessory Device – System devices – 1.1.507.0 improves system stability.
•  Pen Pairing – System devices – 3.0.0.1 enable Surface Pen simple pairing and features.
• Surface Integration – System devices – 1.0.153.0 enables Power Slider feature improving battery life, and improving adaptive brightness feature.

You can purchase Microsoft’s cheaper Surface Pro 4 from the store link here.