1. Bluetooth-Compatible Connectivity: This number pad supports Bluetooth-Compatible connection, eliminating the hassle of tangled cables. Easily connect the keyboard to your laptop, tablet, or smartphone via Bluetooth-Compatible for a more convenient operating experience. 2. 28-key Design: With a 28-key layout including numeric, symbol, and function keys, this numeric pad meets the needs of professionals such as finance and accounting users. Use this compact keyboard to input numbers and special symbols, enhancing work efficiency. 3. Button Cell Battery Powered: The wireless numeric keypad numpad is powered by a button cell battery, making battery replacement extremely convenient. This type of battery is small, , and easy to carry spare batteries. You can replace the battery anytime to continuous use of the keyboard. 4. Slim and Portable: Designed to be slim and portable, this portable mini financial accounting keyboard is incredibly convenient to carry. You can easily slip it into your handbag, briefcase, or pocket. Use this compact keyboard anytime, whether you're working or traveling. 5. Wide Compatibility: This numeric keypad is compatible with various devices including laptops, tablets, and smartphones. It can be paired with different operating systems, providing versatility across devices. Enjoy the convenience of flexible usage across multiple devices, enhancing your workflow. Type:Bluetooth-Compatible Wireless Application: Number Keyboard Standard: 28 Keys Language: English Operation Style: Capacitive Interface Type: USB Style: Standard Interface: 5.0 Bluetooth-Compatible Effective distance: 8-10 metres Battery: 1pc 3V CR2032 button battery (Not included) : more than 5 million times Support 3 systems: for / Androd / IOS Product size: 120.00x85.00x17.00mm Product size: 4.72x3.35x0.67inch Color:Silver Material:Aluminum Alloy Package Contents: 1 * 28-key wireless numeric keypad Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.