Ergonomic Design: Features a scientifically designed 57° tilt angle that conforms to the natural curve of your hand, effectively relieving wrist pressure and reducing fatigue during extended use. Perfectly suited for office workers, designers, and programmers—comfortable to hold all day long Bluetooth & 2.4GHz Wireless: Seamlessly switch between three connection modes: ultra-stable Bluetooth 5.0, widely compatible Bluetooth 3.0, and a low-latency 2.4GHz wireless receiver. No drivers needed—just plug and play. Enjoy smooth, reliable wireless performance and effortless multi-device switching anytime, anywhere Multi-Level DPI Adjustment: 5 precision DPI levels (800/1200/1600/2400/4000), EM18 adapts effortlessly to everything from casual web browsing and everyday documents to high-precision design work. With a single click, you can instantly find the speed that suits you best. It moves as fast as your mind thinks—smooth, intuitive, and precise—delivering that true "point-where-you-think" experience Multi-Scenario Use：silent micro-switches for noiseless clicks that won’t disturb others—ideal for office settings or late-night use. Compatible with Windows, Mac, Android, and Linux systems, and works seamlessly with PCs, laptops, tablets, and smartphones—a truly versatile, all-scenario mouse Professional Customer Support: If you encounter any issues during use, please contact us promptly through Amazon—we’ll provide you with a timely solution, even if the return window has passed. EM18 is specifically designed for users with small to medium-sized hands. Please refer to the detailed product dimensions to ensure the size fits your hand for the best experience ergonomic vertical wireless mouse features a scientifically proven 57° ergo tilt angle that perfectly fits the natural curve of your hand, effectively reducing wrist strain common with Carpal Tunnel mice. Its quiet, silent micro-switches deliver noiseless clicks, ideal for distraction-free environments. Equipped with advanced Bluetooth connectivity and cordless 2.4GHz wireless receiver, it supports seamless switching among up to three devices for ultimate convenience. With five adjustable DPI levels (800/1200/1600/2400/4000), it offers precise control from casual browsing to detailed editing. Compatible with Windows, macOS, Android, iPadOS, and Linux systems, it works smoothly across PCs, laptops, tablets, and smartphones. Designed for users with small to medium-sized hands