The Macally BTWKEYMB is a stylish Bluetooth wireless keyboard with a brushed stainless steel finish and concave keycap design, especially designed for Mac. This keyboard supports up to three Bluetooth macOS and iOS devices. One-touch quick switch allows you to switch easily between your Mac, iPad and/or iPhone. It has 110 full size, thin and quiet Scissor-Key-Switch keycaps with a concave design for a sensitive and responsive touch. It also has 21 convenient preset shortcut keys and a 17-key numeric keypad to quickly and efficiently enter long sequences of numbers. With this keyboard you don't need to buy and replace batteries as it has built-in 650 mAh rechargeable Li-ion battery that lasts over 2 months.