Feature: 1. Dual Modes: This is a programmable keypad, which can be operated via Bluetooth wireless and USB cable, with Type C to USB interface, no driver required, plug and play. 2. Shortcut Key Setting: All the key functions on the standard keyboard for Windows can be set, one key can realize complicated shortcut functions. 3. 3 Layer Function: There are three layer functions, one key can set three different shortcut keys. With storage function, the keyboard is simple to use, no conflict when connecting multiple keyboards, easy to carry. 4. Widely Compatible: After setting on for Windows system, this mini 3 key keypad can be used on systems that support USB protocol, such as for Linux, for OS X, etc. 5. Multi Purposes: Applicable to office, drawing design, games, music, multimedia, industrial control, laboratory, production line testing and other fields. Specification: Item Type: 3 Key Keypad Material: Silicone, Acrylic Purpose: Suitable for recording studio, office, drawing design, game, music, multimedia, industrial control, laboratory, production line testing and other fields Connection Mode: Bluetooth wireless, USB wired connection System Support: For Windows, for Vista, for Linux, for OS X Key Life: Up to 50 million times Size: Approx. 100x34x33mm/3.9x1.33x1.3in Battery Type: 1 x 600mAh lithium battery (built in) Charging Voltage: DC5V 1A Working Temperature: -10℃ to 50℃ Color: White Operating Instructions: 1. Connect the keypad to the computer and open the customized software on the computer. 2. On the customized software, click (yellow area) "key setting area" or "knob setting area", and then click any key (green area) of KEY1 to KEY12 or knob 1 or knob 2 to be set, and red will be displayed after selection. 3. Click the function key corresponding to the simulation keyboard on the customized software, click Download, and the customized keypad can be used after the download is successful. For example, if you want to set keypad key 1 as the shortcut key for copying (Ctrl+C), click the "Key Setting Area" on the software, click "KEY1", and then click the Ctrl and C on the software simulation keyboard, and click Download, can be used after the download is successful. 4. Multimedia Function Setting: Click to simulation keyboard multimedia on the setting software, select the function you need to set, click Download to download, and you can use it when the download is successful. 5. Mouse Function Setting: Click the simulation keyboard mouse on the setting software, click the button or the button corresponding to the key, select the function you need to set, click Download, and it can be used after the download is successful. (Prompt: You can set the mouse function, but you cannot move the computer cursor temporarily!) 6. Layer Function Setting: Click the top right of the setting software to select the layer that you need to set, then click the function that needs to be set on the simulation keyboard, click Download, and it can be used after the download is successful. The keyboard has three layers of functions, one key can set three different functions. The layer keys on the keyboard can be pressed to switch to other layer, the corresponding indicator light will flash at the same time. 7. Bluetooth Connection: First pull out the USB data cable (USB wired mode is default when connecting to the USB interface), and then turn the battery switch on to the "ON" side. Then turn on the Bluetooth function on the computer or mobile phone, search for a Bluetooth name named "HID Keyboard" or "MINI KEYBOARD", click the Bluetooth name to pair, use it after a successful connection.. Package List: 1 x 3 Key Keypad1 x USB Cable4 x Silicone Pad Note: 1. The software can only be run on for Windows system for the time being. Try to download it on the PC side of the computer. The setting software does not need to be installed. It can be run directly when opened. After setting, it will be automatically stored on the link disk, and then plugged into systems such as for Linux and for OS X that support the USB protocol for use (the first time you run, pay attention to the release in the antivirus software and set it as a trust file).2. If the software cannot be downloaded, please consult the customer service.