I bought Apple’s Magic Trackpad, so I’ll show you what it is and how to connect it to your Mac.
Apple Magic Trackpad
overview
Apple genuine multi-touch trackpad. It’s a product that made the MacBook trackpad huge. It seems that it was made for iMac, but it is also recommended to use it with MacBook.
Opened
It’s a trackpad. At 144 x 140 mm, it’s quite large.
battery replacement
Connect Magic Trackpad to Mac
Then, “Apple Wireless Trackpad has been detected” is displayed, so click “Continue”.