. PN: 920-009415 Dimensions MX Keys Keyboard Height 131.63 mm Width 430.2 mm Depth 20.5 mm Weight 810 g Unifying USB Receiver Height 18.4 mm Width 14.4 mm Depth 6.6 mm Weight 2 g Palm Rest Height 64 mm Width 420 mm Depth 8 mm Weight 180 g Technical Specifications Dual connectivity Connect via the included Unifying USB Receiver or Bluetooth low energy technology Easy-switch keys to connect up to three devices and easily switch between them 10 meters wireless range Hand proximity sensors that turn the backlighting on Ambient light sensors that adjust backlighting brightness USB-C rechargeable. Full charge lasts 10 days – or 5 months with backlighting off 6Battery life may vary based on user and computing conditions. On/Off power switch Caps Lock and Battery indicator lights Compatible with Logitech Flow enabled mouse Customization software Logi Options+