PERFECT STROKE KEYS: Spherically-dished keys match the shape of your fingertips, offering satisfying feedback with every tap. COMFORT AND STABILITY: Type with confidence on a keyboard crafted for comfort, stability, and precision. SMART ILLUMINATION: Hand proximity detection and automatic backlighting. FLOW CROSS-COMPUTER CONTROL: Type on multiple computers in one fluid workflow. MULTI-DEVICE & MULTI-OS: Compatible with Windows, macOS, Linux, iOS, and Android systems - pair with up to three devices. USB-C RECHARGEABLE: Full charge lasts up to 10 days or up to 5 months with backlighting off.