Introducing MX Keys, an advanced wireless illuminated keyboard featuring Perfect Stroke keys shaped for your fingertips, smart illumination, and a remarkably solid build. 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.