Features Customizable Control: Mechanical 12 Keys and 2 knobs customizable industrial keypad supports for various functions including enlarge, shrink, copy, paste, select all, cut, game, office, music, media, and industrial control. Fine Craftsmanship: Stylish and perfectly designed with upgraded blue switch and RGB LED, providing enhanced gaming experience and cool visual effects. Personalized Button Functions: Set your own button functions with dedicated programming software and onboard storage for easy access and transfer to different devices without the need to reconfigure. Versatile Connectivity: 12 key mechanical keyboard supports three connection options including USB C, BT, and 2.4G receiver for flexible usage. Efficient: Constructed with ABS material, featuring a rechargeable lithium battery with 400mAh capacity(built in), working voltage of 5V 1A. Specification: Item Type: 12 Key Knob Keyboard Material: ABS Keyboard Switch: Blue Switch Battery Capacity: Rechargeable Lithium Battery 400mAh x 1 (Battery included) Working Voltage: 5V 1A Connection: TYPE C Cable, BT, 2.4G Wireless packing list: 1 x Keyboard 1 x USB Data Cable 1 Bag x Foot Pads (4 pieces in one bag) Notice: Wireless receiver needs to be purchased separately Package List 1 x Keyboard 1 x USB Data Cable 1 Bag x Foot Pads (4 pieces in one bag)