3-Mode Connection: Here comes innovative 1st-Gen 3-mode connection technology, USB-C wired, BT 3.0/5.0 & 2.4Ghz wireless modes which make the user experience upgraded to another level in all fields. Worry-Free Wireless: Built-in upgraded 3.0/5.0 BT and 2.4Ghz wireless chips, K618 offers a real-wireless and no-latency connection for all devices in the market. Easy to toggle among different wireless devices set no limits of possibility. 30% Cutted Ultra-Thin: Low profile designed throughout the whole keyboard from the bottom board, middle low-profile red switches (actuation force: 40g) and the top keycaps aim to shorten the distance to actuation as much as possible. More Extra Practical: Set with 4 x 5 on-the-fly macro keys and a dedicated function area for media control. Convenient to rec frequently used macros without software, play the next song, or just scroll for volume adjustment.