1、Aluminum Alloy Material: Using aluminum alloy panel material, strong and durable, support 7 color backlight. 2、Bluetooth Connection: With Bluetooth 5.0, stable connection, strong and secure Bluetooth connection allows you to work efficiently within 10 meters. 3、Compatible System: Ergonomic design for Windows, for OS system, a perfect complement to your laptop. 4、Mini And Portable: Mini and compact, ultra thin and portable design, easy to carry around and type where you like. 5、Suitability: Our 34 key Bluetooth numeric keypad is perfect for professionals to enter number sequences in spreadsheets, accounting programs and grade books. Item Type: Wireless Number Pad Material: Aluminum Alloy Support System: for Windows, for OS Number Of Keys: 34 Keys Bluetooth Version: Bluetooth 5.0 Keyboard Life (Number Of 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 Use Time: Open Backlight About 80 Hours, About 2.6 Hours When The Backlight Is Open To The Maximum Standby Time: Not Open Backlight > 10 Months 1 x Keypad 1 x User Manual 1 x Charging Cable