You will need: Arc, a computer with a USB-C port, a Chromium Browser (Chrome, Edge, Brave). Total Time: 5 – 10 minutes. Questions? Email us at hello@nanuelectrics.com. [Update Your Arc Here]. If your unit was purchased before January 2026 and has not

<h3 id="isPasted">THINGS TO KNOW BEFORE UPDATING</h3><ul><li dir="ltr" style="text-decoration:none;">You will need: Arc, a computer with a USB-C port, a Chromium Browser (Chrome, Edge, Brave)</li><li dir="ltr" style="text-decoration:none;">Total Time: 5 &#x2013; 10 minutes.</li><li dir="ltr" style="text-decoration:none;">Questions? Email us at <a data-fr-linked="true" href="mailto:hello@nanuelectrics.com">hello@nanuelectrics.com</a>&#xA0;</li></ul>[<a href="https://firmware.nanuelectrics.com/" style="text-decoration:none;">Update Your Arc Here</a>]<h3 dir="ltr" id> </h3><h3 dir="ltr" id="isPasted">HOW DO I KNOW WHAT FIRMWARE I HAVE?</h3><div tabindex="0" data-qa="virtual-list-item" data-item-key="1768597143.340199" id="isPasted"><div data-qa="message_container" data-qa-unprocessed="false" data-qa-placeholder="false" data-msg-ts="1768597143.340199" data-msg-channel-id="D02JR0UF5ND"><div data-qa-hover="true"><div data-qa="message_content"><div data-qa="message-text"><div data-qa="block-kit-renderer"><div dir="auto">To check your firmware version, the steps vary depending on your unit. If your Arc was purchased in or after January 2026, it already includes the latest firmware&#x2014;simply press and hold the front alarm knob for 5 seconds, and the firmware version will appear on the display.&#xA0; </div></div></div></div></div></div></div> <img src="https://attachments.gorgias.help/30BVo7vMLr2rvzmQ/hc/qgaXzxa33M2vDWOp/2026011620-abf6489a-49a7-4636-8343-a368629a03ab-updated%20firmware%20version@2x.png" style="width: 680px;" class="fr-fic fr-dib"> If your unit was purchased before January 2026 and has not yet been updated, the firmware version is shown during the power-down process. To view it, unplug Arc, then press and hold both back knobs at the same time for 10 seconds. As the device powers down, the firmware version will briefly appear on the display before the unit turns off. After updating to firmware version 2.50.3 (January 2026), you&#x2019;ll be able to check the firmware at any time using the front knob method. <h3 dir="ltr" id="isPasted">HOW DO I KNOW WHAT VERSION IS THE NEWEST UPDATE?</h3>You can find the most recent version on the <a href="https://nanu-electrics.gorgias.help/en-US/arcs-firmware-changelog-4128690" target="_blank" rel="noopener noreferrer">Arc firmware release notes</a>, and the <a class="fr-strong" href="http://firmware.nanuelectrics.com">firmware update page</a>.<h3 dir="ltr" id="isPasted"> </h3>

How to Update Arc's Firmware

Released: 2026-01-16  Recommended for all users. WHAT'S NEW:. Improved timekeeping accuracy, continuous always-on backlight, better Blackout Mode, digital display longevity improvements. UPDATE DETAILS:. 1. Improved Timekeeping Accuracy. Some custome

<h3 dir="ltr" id="isPasted">FIRMWARE VERSION HISTORY</h3><table style="width: 100%; border: 1px solid black; border-collapse: collapse;"><tbody><tr><td style="width: 15.3905%; padding: 16px; border: 1px solid black; background-color: rgb(239, 239, 239);">VERSION</td><td style="width: 26.5896%; padding: 16px; border: 1px solid black; background-color: rgb(239, 239, 239);">RELEASE DATE</td><td style="width: 57.8035%; padding: 16px; border: 1px solid black; background-color: rgb(239, 239, 239);">WHAT&apos;S NEW</td></tr><tr><td style="width: 15.3905%; padding: 16px; border: 1px solid black; vertical-align: middle;">2.32</td><td style="width: 26.5896%; padding: 16px; border: 1px solid black;">2025-03-06</td><td style="width: 57.8035%; padding: 16px; border: 1px solid black;">[Recommended for all users] Important bug fix.</td></tr><tr><td style="width: 15.3905%; padding: 16px; border: 1px solid black; vertical-align: middle;">2.38 </td><td style="width: 26.5896%; padding: 16px; border: 1px solid black; vertical-align: top;">2025-04-01 </td><td style="width: 57.8035%; padding: 16px; border: 1px solid black;">[Optional] Internal improvements to support production testing and calibration. No changes to user-facing features or device behavior. </td></tr><tr><td style="width: 15.3905%; padding: 16px; border: 1px solid black; vertical-align: middle;">2.50.3</td><td style="width: 26.5896%; padding: 16px; border: 1px solid black; vertical-align: middle;">2026-01-16</td><td style="width: 57.8035%; padding: 16px; border: 1px solid black; vertical-align: middle;">[Recommended for all users]&#xA0;Improved timekeeping accuracy, continuous always-on backlight, better blackout mode, digital display longevity improvements.</td></tr></tbody></table><h3 id> </h3><h3 id="isPasted">UPDATE 2.50.3</h3>Released: 2026-01-16&#x2028;&#x2028; Recommended for all usersWHAT&apos;S NEW:Improved timekeeping accuracy, continuous always-on backlight, better Blackout Mode, digital display longevity improvements.UPDATE DETAILS:1. Improved Timekeeping AccuracySome customers reported their clock running fast. This update addresses that issue:<ul><li dir="ltr" style="text-decoration:none;">Fixed a bug that caused some units to gain time</li><li dir="ltr" style="text-decoration:none;">Improved timekeeping logic to ensure all clocks perform as expected, within &#xB1;30 seconds per month</li></ul>2. Continuous &#x201C;Always-On&#x201D; BacklightBased on popular demand, the backlight can now stay on continuously:<ul><li dir="ltr" style="text-decoration: none; font-weight: bold;">To switch to Continuous Backlight, press and hold the rear brightness knob for 2 seconds</li><li dir="ltr" style="text-decoration:none;">Backlight on/off is still controlled using the snooze bar (press once to turn on, press once to turn off)</li><li dir="ltr" style="text-decoration:none;">Backlight brightness options have been expanded from 3 levels to 5, adding two dimmer settings for overnight use</li><li dir="ltr" style="text-decoration:none;">If you prefer the previous behavior, you can switch back to the legacy Momentary Backlight by pressing and holding the rear brightness knob for 2 seconds </li></ul>3. Better Blackout ModeFor people who prefer a truly dark bedroom, Blackout Mode is essential. Some users told us it was inconvenient that a quick press of the snooze bar at night, just to illuminate the clock face and check the time, would also cancel Blackout Mode and require it to be re-enabled. This update makes Blackout Mode more intuitive:<ul><li dir="ltr" style="text-decoration:none;">Pressing the snooze bar will no longer cancel Blackout Mode</li><li dir="ltr" style="text-decoration:none;">Pressing the front knob still exits Blackout Mode, just as before </li></ul>4. Digital Display LongevityThis update includes refinements designed to help protect the display over long-term, everyday use:<ul><li dir="ltr" style="text-decoration:none;">The display now dims automatically after 10 seconds of inactivity, reducing unnecessary pixel wear and tear when the clock is not actively being used</li><li dir="ltr" style="text-decoration:none;">Display brightness is now automatically managed using two simple states: Active (bright)&#xA0;and&#xA0;Inactive (dim)</li><li dir="ltr" style="text-decoration:none;">The dim state matches the previous lowest brightness setting and remains easy to see in a dark room</li><li dir="ltr" style="text-decoration:none;">This allows you to check alarm status at a glance without pressing any buttons, while helping preserve long-term display quality</li></ul>[<a href="https://firmware.nanuelectrics.com/" style="text-decoration:none;">Update Your Arc Here</a>]

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