Features: 1.KEY CONDITION: Numeric keyboard adopts 28 independent keys, including Delete, Backspace key, input and correction is more convenient 2.COMFORTABLE AND SIMPLE: The numeric keyboard has a low keypad design, comfortable keypad feel and simple keypad layout 3.SAFE AND WATERPROOF: The USB numeric keyboard is designed to prevent splashing, which reduces the possibility of water and short circuit of the keyboard 4.NEAT TYPING: The wired mini keyboard fits the shape of a finger and is suitable for touch typing. Chocolate key design, crisp, comfortable to type 5.WIDELY COMPATIBLE: Small keypad numeric input bring independent operation, no conflict with the computer keyboard, compatible with a variety of operating systems, no need to install drivers specification:Item Type: Numeric Keyboard Material: Aluminum alloy Connection Mode: Wired, BT Number of Keys: 28 Keys BT: 3.0 Support: USB Applicable Model: Almost any computer with USB Compatible: For iOS, for Android, for Windows Built in Polymer Lithium Battery: 140mAh PackageList: 1 x Numeric Keyboard 1 x Charging Cable 1 x User Manual