Features: new 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 experience. 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 Note:1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:1 Set Wireless Keyboard