This numberic keyboard is made of sturdy top-grade ABS material with perfect effect. With built-in receiver storage, , signal transmission stability, up to 10 meters working range, easy to carry. Convenient and easy to use, and is applicable to any desktop and laptop computers. Feature - Color: Black - Material: ABS - Size: 12.3x8.5x2.2cm - Response speed: 5msec - Transmission distance: 10m - Working : 0.25mA - Working voltage: 3V - Working time: 80h - numberic keyboard - Built-in receiver storage, signal transmission stability, up to 10 meters working range, easy to carry - Fast mechanical keys with medium resistance, precise actuation, click sound, and tactile bump feedback. - The stepped keycap,fit your hands easily to prevent fatigue. Spring type ergonomic design, care for your wrist. Works with PC and desktop computers that have 2000 / XP / Vista / 7 / 8 / 10 operating systems - for your pc Package list: 1 x numeric keypad