Features: and Double modes design: The keyboard supports double modes, and can connect devices through 2.4G wireless and Bluetooth-compatible to meet the different needs of users.Large characters: the keyboard is designed with large characters, and the characters are clearly visible, which is especially suitable for the elderly or users with poor eyesight.2.4G wireless connection: 2.4G wireless connection is supported, and users can operate in a certain ranges more freely without using the traditional wire connection modes.Multi-platform universal: it is suitable for desktop computers, notebook computers and other types of devices, providing a wide ranges of compatibility and facilitating users to input on different devices.Old people: Suitable for old people. The design of large characters makes the keys more clear and easy to see, which helps them to input word more conveniently. Poor eyesight: suitable for users with poor eyesight. The design of large characters solves the problem of illegible characters and provides a better solution. Specifications:Material: ABSWorking distance: 10MNumber of keys: 78Support for wireless/Bluetooth-compatible: Bluetooth-compatible 3.0+2.4GWireless/Bluetooth-compatible transmission distance: 10mWorking current/voltage: 0.25mA 3V.Battery capacity: 2xAAA (Not Included)Size:Approx.28.5x12x0.5cm/11.22x4.72x0.19inch Package includes:1 Set Wireless Keyboard