Feature: 1. USB and Bluetooth Dual Mode: Automatic switching, plug in USB, switch to USB mode, unplug USB will switch to bluetooth mode. If there is no operation on the wireless Bluetooth for 15 minutes, automatically enter the sleep mode. 2. Programmable Function: A mini keyboard with programmable functions, which can set all key functions on the standard for Windows keyboard, and realize complicated and complex combination shortcut keys with one key. 3. Storage Function: The mini 9 keys keyboard has a storage function, which can be used on systems such as for Linux and for OS X that support the USB protocol after being set up on the for Windows system. 4. Knob Function: The knob can be set to zoom in and out, cut to the previous song, increase the volume of the next song, decrease the volume, pause, play and other functions, which is a good helper for assistance. 5. Application: Type C to USB interface, no driver required, plug and play, and can also simulate a mouse. It is suitable for office, game, music, media, industrial control, laboratory, production line testing and other fields. Specification: Item Type: Shortcut Programmable Keyboard Material: Acrylic, PCB Uses: Suitable for office, games, music, media, industrial control, laboratory, production line testing and other fields. System Support: For Windows, for VISTA, for Linux, for Macos (for OS X needs to be set up on the for windows to use) Connection Mode: Bluetooth, USB Button Life: Up to 50 million times Type: Dustproof Blue Switch Number of Keys: 9 Keys Product Size: Approx. 110x73x38mm / 4.3x2.9x1.5in (L x W x H) Current and Voltage: DC 5V/1A Working Temperature: -10℃ to 50℃ Battery: Built in 1PC 1000mAh Lithium Battery Battery Type: None . Package List: 1 x Shortcut Programmable Keyboard1 x USB Cable Note: 1. If there is no operation of wireless Bluetooth for 15 minutes, it will automatically enter into sleep mode. During sleep mode, click Key 1 on the keyboard to wake up. Wake up time, about 2 seconds to complete, and auto connect.2. The battery life, fully charged, can be used for about 1 month normally. When charging, the indicator light is Red, and the indicator is Green when fully charged.3. Layer function switching, press the layer button to switch a layer, and the current layer will be automatically memorized after power off. Reminder: This software can only be run on for Windows system temporarily, try to download it on the PC side4. Outputting a single letter is the normal factory setting, just open the custom software to redefine the function of the button.5. The setting software does not need to be installed. It can be run directly after opening. After setting, it will be automatically stored on the chain disk, and then plugged into systems that support USB protocol, such as for Linux and for OS X. into a trust document)! !6. For software download problems, please consult customer service, and customer service will help you solve it!