The ProtoArc EM25 Fast-Scroll Ergonomic Mouse is a multi-functional device designed for modern, multi-device workflows. It supports connectivity with up to three devices simultaneously via Bluetooth, alongside a 2.4GHz wireless dongle, and is compatible with Windows, macOS, Android, ChromeOS, and iPadOS. The mouse is built around a customisable user experience, with adjustable DPI (dots per inch) settings allowing users to fine-tune cursor sensitivity based on their specific tasks. Its ergonomic design promotes a more natural hand and wrist position, making it particularly suited for extended use.

Design and Features
The EM25 features a vertical ergonomic form factor, which helps maintain a neutral wrist posture during prolonged sessions. The build incorporates thoughtful design elements, including integrated storage for the wireless dongle secured by a magnetic cover, ensuring it remains protected when not in use.
Performance-wise, the mouse offers:
- Up to 8000 DPI, with multiple sensitivity levels
- Fast scroll functionality with precision control
- Dedicated thumb scroll wheel for enhanced navigation
- Quiet-click buttons, including back and forward controls
- Polling rate up to 1000Hz, supporting responsive performance
The DPI settings are clearly indicated via an LED colour system:
- Red → 1000
- Blue → 1600
- Green → 2400
- Yellow → 3600
- Light Blue → 4800
- Orange → 6200
- Purple → 8000
This allows users to quickly adjust performance depending on their needs—for example, lower DPI for precision work and higher DPI for faster navigation.
Setup and Usability
Setup is straightforward and user-friendly. There is no requirement to install software, with connectivity handled seamlessly through Bluetooth or the included wireless receiver. Pairing is simple—holding the Bluetooth button for a few seconds enables switching between devices, making it well suited for users working across multiple systems.

Battery and Build Quality
The mouse is powered by a USB-C rechargeable 500mAh battery, offering:
- Up to 200 days standby with auto-sleep functionality
- Wireless range of up to 10 metres
- Durability rated at over 3 million clicks
These specifications support reliable long-term usage in both home and professional environments.
Company Background
ProtoArc is a relatively new company, founded in 2021, with headquarters in The Woodlands, Texas, and a global presence across Asia and Europe. The company focuses on ergonomic workspace solutions, including mice, keyboards, and productivity accessories, positioning itself as a value-focused alternative to more established peripheral brands.
Warranty
The EM25 is supported by a 2-year manufacturer warranty, providing coverage for added peace of mind.
Conclusion
The ProtoArc EM25 delivers a strong combination of ergonomic design, multi-device functionality, and customisable performance. It is comfortable to use over extended periods, with well-positioned buttons that feel natural and intuitive. The ability to connect to three devices, combined with both Bluetooth and wireless dongle options, enhances its flexibility for hybrid or multi-device setups.
The adjustable DPI settings, while potentially unfamiliar to some users initially, provide valuable control once configured, allowing the mouse to adapt to different tasks with ease. Overall, the EM25 stands out as a well-designed, feature-rich ergonomic mouse that prioritises both comfort and productivity.