TL;DR CMF has released a new teaser for the soon-to-be-released Headphone Pro. The audio device has a feature called the “energy slider.” It’s currently unknown what this slider does. Nothing’s sub-brand, CMF, began teasing its first-ever pair of headphones last week. Called the Headphone Pro, there’s not much known about the device yet, other than you’ll be able to customize it with different earpad colors. With the launch only a week away, the company has now shared a new detail about its upcoming audio product. Don’t want to miss the best from Android Authority? Set us as a favorite source in Google Discover to support us and make sure you never miss our latest exclusive reports, expert analysis, and much more. You can also set us as a preferred source in Google Search — find out more here. Similar to Nothing’s Headphone 1, the CMF Headphone Pro will have an assortment of differently-shaped buttons and controls. Among those controls is a feature that looks a lot like a volume slider. However, it appears this slider may not be for controlling volume, as the company calls the feature an “energy slider.” Meet the energy slider. What do you think it does? Headphone Pro. 29 September. pic.twitter.com/mfxjh2mJ7r — CMF by Nothing (@cmfbynothing) September 22, 2025 Nothing’s sub-brand did not elaborate on what the energy slider does, but invited fans to guess its purpose. Some of the more common guesses suggested that the slider may allow you to control the bass level. A few other comments mention the possibility of it controlling the active noise cancelation level or the equalizer. Whatever it does, we’ll learn about it next week. The Headphone Pro is scheduled to launch on September 29, 2025. Follow