Macally BTWKEYMB The Macally BTWKEYMB is a stylish and ultra slim Bluetooth wired keyboard for Mac that can connect up to three devices Fully Wireless Connection Connect up to three different mac devices within seconds for a reliable keyboard connection Full - Size Keyboard 21 Apple Shortcut Keys and 17-key numeric keypad help to provide an interactive and efficient typing experience all in one Long Lasting Battery Life Built-in 650mAh rechargeable Lithium-ion battery lasts up to 2 months, no need to replace battery.