It is easy to read because this numeric keypad uses dual modes display screen. The button has matte texture, which can bring you comcompatible withtable touch.Using 2.4G wireless technology, this numeric keypad features stable transmission and high sensitivity, bringing you smooth using experience.It is constructed of ABS material. This numeric keypad is plug and driver-free, which is easy and convenient to use.The length of this product is 15.5cm, the width is 8.8cm and the height is 2cm. It is mini and ultra-thin, which can be carried with you easily and conveniently.This numeric keypad is compatible compatible with Microsoft, compatible with Android, compatible with Mac OS.Item Name: Numeric KeypadMaterial: ABSBattery Capacity: 250mAh(Included)Effective Distance Transmission: 10mButton Life: More Than 5 Million TimesNumber of Keys: 20 KeysOperating Voltage: 4.5V-5.5VCompatible System: compatible with Microsoft, compatible with Android, compatible with Mac OSFeatures: Quick Response, Waterproof, Plug PlaySize Details:L: 15.5cm/6.1", W: 8.8cm/3.46", H: 2cm/0.79"(Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Numeric Keypad1 x USB Port 1 x Data Cable