Aluminum Alloy Material: Utilizes an aluminum alloy panel for strength and durability, supporting 7 backlight colors. Bluetooth Connection: Features Bluetooth 5.0 for a stable, strong, and secure connection, allowing efficient work within 10 meters. Compatible System: Ergonomically designed for Windows and OS systems, it's a perfect complement to your laptop. Mini and Portable: Mini, compact, ultra-thin, and portable design makes it easy to carry and type wherever you go. Suitability: Our 34-key Bluetooth numeric keypad is ideal for professionals inputting number series into spreadsheets, accounting software, and grade books. Item Type: Wireless Numeric Keyboard Material: Aluminum Alloy Supported Systems: for Windows, for OS Number of Keys: 34 keys Bluetooth Version: Bluetooth 5.0 Keyboard Lifespan (Keystrokes): 5 million times Response Speed: 30 milliseconds Wireless Bluetooth Transmission Distance: 10m / 10.9yd Battery Type: Lithium Battery Battery Model: 503035 Battery Capacity: 500mAh (included) Charging Time: 2 hours Usage Time: Approx. 80 hours with backlight on, approx. 2.6 hours with backlight at max. Standby Time: Over 10 months without backlight. 1 x Keypad 1 x User Manual 1 x Charging Cable