Aluminum Alloy 35 Keys Bluetooth-compatible Wireless Numeric Keypad Dual Mode Features: 1.This keyboard supports both for Mac and Windows systems, with wireless and Bluetooth-compatible modes, can connect and convert three computers at the same time 2.This product is designed for laptop users who need numeric input function. This excellent numeric keypad provides a simple and fast typing experience 3.Auto reconnect: the keyboard automatically connects to the last paired device. Compatible for Windows, Android, Mac, 10s systems: lightweight and convenient 4. Rechargeable, no need to replace the battery, keys with "scissor foot structure" design, effectively reduce the error input, key input more comfortable and faster. 5. Sandblasted aluminium alloy shell, elegant and durable, built-in 300m rechargeable lithium polymer battery, 20 hours of continuous work, standby for 30 days. Specification: Number of keys: 35 keys Battery capacity: 400mA Bluetooth-compatible version: Bluetooth-compatible 3.0 or 5.2 dual channel Battery life: 80 hours Operating frequency: 2.402-2.480GHz Standby time: 600 hours Power supply: Built-in lithium polymer battery USB: Type C charging plug System Compatibility: For Mac OS 10.0 or above, | OS 9.2 and above, compatible for Mac, Macbook, Macbook Air / Pro. Windows 2000 / XP / Vista / 7/8/10, Android Colour: grey-black, silver-white Material: Aluminium Alloy Product net weight: 128.2g Product Size: 14.5x13.2x12.8cm Package Includes: 1 x Keyboard 1 x Charging cable 1 x Receiver (Others not included) Note: 1. Please allow 1-3 mm error due to manual measurement. Please make sure you don't mind before ordering. 2. Please allow 1-3g weight error. Please make sure you don't mind before ordering. 3. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you!