【Multi-device Switching】Experience seamless connectivity with dual Bluetooth: The KN300BT wireless number pad can quickly switch between two paired devices. Simply press 'BT1' or 'BT2' to toggle without disconnecting and re-pairing- perfect if you work across multiple devices such as desktop computers, laptops, MacBooks, iPads, tablets or smartphones. 【Immediate Productivity Boost 】With a full-size of 34 keys, including numeric zone and all essential keys for spreadsheets and data entry, such as Esc, Tab, Back Space, Delete, Home, Page up, Page down and four arrow keys. The 10 key is particularly useful for accountants, data specialists, and anyone doing heavy number input work. It reduces the strain of reaching for numbers on a regular keyboard and speed up calculations. 【Universal Number Pad for Laptop】The Bluetooth numpad is compatible with almost all operating systems including Windows, Mac, IOS, Linux, Android. Through the OS switch on the top of the number keypad, instantly adapting its functions for your operating system. It's versatile with the ability to customize F13-F15 keys for Mac users, while the dedicated calculator key and parentheses keys are specifically optimized for Win systems. 【Compact& Quiet Operation】 Slimmer than a smartphone just 5.5*4.6*0.62 in and 5.57oz, the lightweight keypad fits easily into a briefcase or backpack for business travel. The low-profile scissor-switch keys are silent and responsive, feel similar to typing on a macbook- ideal for offices and shared workspaces where noise matters. 【Rechargeable& Long Standby】Built-in 300mAh rechargeable lithium battery, lasts up to 1-2 months with daily use on a single charge, you do not have the problems of frequent charging. The ten key enters auto sleep mode after being idle for 1 hour to conserve battery, just press any key to wake instantly. Easily recharging via the included Type-C to Type-A cable (for charging only). 【Warm Tips】The KN300BT numeric keyboard features no backlight and cannot be programmed. Bluetooth connectivity is only compatible with Windows 8 and above, Mac OS 10.10 or later. 【Kisnt Grows with You】Any quality issues in 2 years? A new one on us. Typing goes on, our refinement never stops. Each Kisnt keyboard is never finished at launch. It evolves with you—keystroke by keystroke. Upgrade your workflow with the Kisnt KN300BT-- Bluetooth mode allows you to pair with up to 2 devices and switch seamlessly between your laptop, tablet, and smartphone. Designed with user comfort in mind, features a 15° ergonomic tilt that reduces wrist strain during long typing sessions. Anti-slip pads keep the keypad firmly in place, while the quiet, responsive keys deliver a satisfying tactile feel without disturbing others. Powered by 300mAh rechargeable battery, can last up to 1-2 months with daily use on a single charge (depending on usage). The intelligent auto-sleep function activates after 60 minutes of inactivity to conserve power — press any key to wake it instantly. The essential laptop companion for anyone who values efficiency, comfort, and reliability. Perfect for accountants, data entry professionals, office workers, students, remote workers, and anyone who frequently works with numbers. Please note: On Windows: Calculator key= Open the Calulator app and NumLock key is standard number lock function. On Mac: Calculator key=F13 NumLock =“Clear”