Features: 1.BT Connection: This wireless number pad adopts BT4.0 wireless connection, which provides quick response and sensitive control. 2.19 Keys: This numeric keypad adopts 19 keys in total, with concave style, offering most comfortable tilt angle and reducing pressure on wrist. 3.Widely Compatible: This wireless keypad is suitable for Win 98/95/NT/for ME/2000/for Win XP/for Vista/7.0/8.0 or higher, compatible with laptop and desktop. 4.Battery Powered: This number pad is powered by 1 piece of AAA battery. The BT is prepared to be connected when green light is flashing. 5.Durable ABS: This wireless numeric keypad is made of premium ABS material, which is sturdy and highly durable. specification:Item Type: Wireless Number Pad Material: ABS Color: Black Connection Mode: BT 4.0 Battery Type: 1 x AAA Battery Required (Battery Not Included) Key: 19 Keys PackageList:1 x Wireless Number Pad 1 x User Manual