Feature: 1. Programmable Keyboard: All keys of 9 key mini keyboard are programmable, and all key functions of standard for Windows keyboard can be set. (Custom programmable key functions include conventional 104 keys, 8 web navigation keys, 8 multimedia shortcuts, keyboard lock,for Windows lock, etc.) 2. Dual Mode Connection: Programmable macro keyboard supports wired USB and wireless Bluetooth dual mode connection at the same time. You can freely choose a detachable USB cable, which makes it easier to use. 3. Widely Used: Macro keyboard is suitable for office, games, music, media, industrial control, laboratory, production line testing and other fields, and is an ideal choice for designers and professional programmers. 4. Knob Function : The knob can not only be rotated and adjusted, but also be used as a key, and can be set to zoom in and out, switch tracks, volume up, volume down, pause, play, etc. The operation is simple and convenient. 5. Mini Portable: Programmable macro keyboard is designed in mini size, which effectively saves desktop space. You can connect the keypad (plug and play) and another keyboard on the same computer at the same time, and they will not interfere with each other. Specification: Item Type: Programmable Macro Keyboard Material: Acrylic Type of Key: 9 Key Mechanical Keyboard,3 x Knob (the Knob Can Be Pressed As a Key) Key Switch Body: Blue Switch Equipment:For General Purpose Computer. Type of Battery: Built in 500mah Lithium ion Battery. Package List: 1 x Programmable Macro Keyboard Note: Shipment with built in battery.