Das Keyboard 4 professional Mac version with usb 3 hub. Cherry MX blue switches. Perfect condition, includes all accessories, and original packaging. Pickup in Mountain View. Cherry MX mechanical key switches with gold contacts Dedicated media control with oversized volume knob Two-port USB 3.0 SuperSpeed hub - Up to 5Gb/s, 10x the speed of USB 2.0 (Two-port USB 2.0 hub for Das Keyboard 4 root models) Instant sleep button to save energy Laser etched key inscriptions Bumps on F and J keys (home keys)