Features: 1.DIY Programmable: All keys are programmable. All key functions of the standard for Windows keyboard can be set, and a complex combination of shortcut keys can be realized with one key. 2.Dual Mode Connection: Support both wired USB and wireless BT dual mode connection, detachable USB cable, easy to use. 3.Knob Function: It can not only be rotated to adjust, but also can be used as a button. The knob can be used to set zoom, pause, play and other functions. 4.Small and Portable: Small and portable, you can carry it with you, effectively saving desktop space. 5.Wide Applications: Suitable for office, game, music, media, industrial control, laboratory, production line testing and other fields. specification:Item Type: Mechanical Gaming Keypad Material: Acrylic Key Type: 9 Keys Mechanical Keyboard, 2 x Knob (the Knob Can Be Used As a Key to Press) Applicable Equipment: Computer Universal Battery Type: Built in 200mAh Lithium Ion Battery PackageList:1 xMechanicalGamingKeypad 1 xData Line 1 xUser Manual