Feature: 1. A total of 16 keys and 3 knobs; the functions of each button and knob can be customized by pressing the clockwise or counterclockwise knob; 2. Various LED light effect settings; 3. Divided into three layers (LED indication), it can meet different usage needs, avoid multiple settings, improve work efficiency, and enhance entertainment and leisure experience; 4. It has an ultra-thin design and is equipped with a silicone anti-slip pad at the bottom. It has a grand appearance and is easy and stable to use; 5. Set up on the computer first, and then use it on other systems;you can set combination shortcut keys,could enter max 18 characters one key, the keyboard has It has a storage function. 6.if need to use bluetooth function,please first setup when wired, then connect via bluetooth,un-wired,software will show:disconnect but the keyboard will remember your setup,you can keep to use. In Bluetooth or 2.4G mode, keyboard will auto turn off the lights to work longer. Wired Bluetooth Version Package includes 1/Keyboard 1/usb data cable 2.4GConnect Version Package includes 1/Keyboard 1/usb data cable 1/ USB 2.4G receiver