Connection either via Bluetooth or 2.4 GHz wireless AES-128 encryption Built-in lithium rechargeable battery with USB-C connection Status LEDs for the CAPS LOCK, NUM and SCROLL keys Extra-small nano receiver for wireless operation Durable key labels Quality meets design and innovation. The CHERRY KW 9100 SLIM is a silver-black version of the keyboard from the popular DW 9100 SLIM desktop set. As with the tried and tested desktop version, first-class workmanship, perfectly coordinated design and innovative functions come together. Keyboard Certification CE, FCC, UKCA, China RoHS Frequency band 2.4 - 2.4835 GHz Keyboard keys operating life 10 million characters Keyboard number of keys 107 Numeric keypad Yes Pointing device No Keyboard language English Keyboard layout QWERTY Keyboard key switch technology Cherry SX Device interface RF Wireless + Bluetooth Connectivity technology Wireless Recommended usage Universal Design LED indicators Yes Surface coloration Monochromatic Product colour