Durable ABS: This mini mechanical keypad with 15 keys and 3 knobs is made of durable ABS and acrylic material. Blue switch offers comfortable working and gaming experience. Programmable Keypad: This mini keypad with Type C to USB interface is programmable without drivers needed. Plug and play, all keys functions can be set according to you need. Blue Switch: This one handed keypad adopts blue switch mechanical style, which is ideal for office, games, music, media, industrial control, laboratory, production line testing and other fields. 3 Knobs: This gaming keyboard is designed with 15 keys and 3 knobs. Knobs can be set for functions of zooming in/out, song skipping, volume control, pause and play, etc. Memory Function: This gaming keypad with memory function is suitable for Win, for Linux, for OS X Laptop operating system.