?RGB BACKLIGHT?Set the keyboard backlit via the software to adjust the rhythm and light and shadow effects. Or choose the color of each key from a spectrum of over 16.8 million colors freely via the software, choose what your favorite and what works best for you, and bring you wonderful visual experience and fun, default 19 modes. ?LONG TIME USE?60% mechanical keyboard with 2000mAh rechargeable battery and smart power saving mode, can allow you to use continuously about 15 hours with lightest backlit, up to 360 hours standby time. In wired mode, it can be charged during use, so there is no need to worry about running out of power during use. ?60% KEYBOARD LAYOUT AND PBT KEYCAPS?Compact layout with 69 keys and minimalist design make your desktop neat and orderly. Tips you might want to know is that keyboard without numpad, which will provide more space for mouse movement, will be the choice of most FPS players. Ultimate comfortable, the PBT material provides more delicate surface and a better touch feeling. ?HOT-SWAPPABLE RED SWITCH?Hot-swappable Kailh PCB allows you to replace most of the 3 pins/5 pins switches freely (brands like Cherry, Gateron and Kailh, etc.) Equipped with special Modified Red Switches offer the same experience as Cherry MX Red and life span reaches up to 60 million. The softest and lightest linear mechanical switch. ?TRIPLE MODE MECHANICAL KEYBOARD?Wireless modes with stable Bluetooth 5.0 chipset, hassle-free 2.4Ghz dongle plus USB wired mode ensure no limits low latency and stable connection. The K690T is best for smartphone, laptop, and tablet.