1. 12 Keys and 3 Knobs: This gaming keyboard is designed with 12 keys and 3 knobs. Knobs can be set for functions of zooming in/out, song skipping, volume control, pause and play, etc. 2. Programmable Keypad: This mini keypad is programmable without drivers needed. Type C to USB interface, plug and play. 3. Memory Function: This gaming keypad with memory function is suitable for Win, for Linux, for OS X Laptop operating system. 4. Blue Switch: This one handed keypad adopts blue switch, which is ideal for office, games, music, media, industrial control, laboratory, production line testing and other fields. 5. Durable ABS: This mini mechanical keypad with 12 keys and 3 knobs adopts durable ABS and acrylic material. Blue switch offers comfortable working and gaming experience. Specification: Item Type: Programmable Keypad Material: Acrylic, ABS Color: White Keys: 12 Keys Switch: Mechanical Blue Switch Knobs: 3 Connection Mode: BT or Wired Interface: Type C Battery: 300mAh Battery(Inbuilt) How to Use: Connect and use packing list: 1 xProgrammable Keypad 1 x Type C CableDurable ABS: This mini mechanical keypad with 12 keys and 3 knobs adopts durable ABS and acrylic material. Blue switch offers comfortable working and gaming experience. Blue Switch: This one handed keypad adopts blue switch, which is ideal for office, games, music, media, industrial control, laboratory, production line testing and other fields. 12 Keys and 3 Knobs: This gaming keyboard is designed with 12 keys and 3 knobs. Knobs can be set for functions of zooming in/out, song skipping, volume control, pause and play, etc. Programmable Keypad: This mini keypad is programmable without drivers needed. Type C to USB interface, plug and play. Memory Function: This gaming keypad with memory function is suitable for Win, for Linux, for OS X Laptop operating system.