---
title: "Unknown 2 Icon | Free Download PNG & SVG | Sharp Line - Material Symbols"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/download/unknown-2--29909
canonical_url: "https://www.streamlinehq.com/icons/download/unknown-2--29909"
summary: "Sharp line icon of a circle split diagonally, with plus and minus signs. Used for contrast, image editing, and theme controls."
---

# Unknown 2 icon

The Unknown 2 icon shows a circle divided diagonally, with a plus sign in the dark upper section and a minus sign in the light lower section, drawn in the Sharp Line style on a 24px grid for clear geometric rendering at small sizes. Use it for contrast controls, image editing, brightness adjustments, and light-dark theme settings. It belongs to Sharp Line - Material Symbols free set in the Google Material family.

## Preview

![Sharp line icon of a circle split diagonally, with plus and minus signs. Used for contrast, image editing, and theme controls.](https://assets.streamlinehq.com/image/private/w_300,h_300,ar_1/f_auto/v1/icons/photo-image/unknown-2-xtqf5n4z1j0aycq3gkyqeq.png/unknown-2-2elpkg7jbwlo99kfd5hoq8.png?_a=DATAiZkSZAA0)

## Details

- **Name**: Unknown 2
- **Type**: Icon
- **Set**: [Sharp Line - Material Symbols](/icons/material-symbols-sharp-line.md) — Material Symbols by Google - free customizable icon set with icons in outlined, rounded, and sharp variants.
- **Family**: [Google Material](/icons/material-symbols.md)
- **Style**: Line, Outlined, Geometric
- **Category**: Photo Image › Photo Image
- **Default size**: 24px
- **Pricing**: Free
- **License**: [Apache](https://www.apache.org/licenses/LICENSE-2.0.txt)
- **Author**: [Google](https://fonts.google.com/icons)
- **Formats**: PNG, WEBP, PDF, SVG, JSX
- **Tags**: brightness, contrast, plus, minus, light, dark, settings, balance, polarity, control, duality, opposite, adjustment, display, toggle, positive, negative, unknown

## Download

- [Download Unknown 2 on Streamline](https://www.streamlinehq.com/icons/download/unknown-2--29909)

## Also available in other styles

- [Unknown 2 — Rounded Line - Material Symbols](/icons/download/unknown-2--29951.md) (Free)
- [Unknown 2 — Outlined Line - Material Symbols](/icons/download/unknown-2--30001.md) (Free)

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