Typing
RTINGS found it very quiet with good typing quality, but the spacing is cramped next to full-size keyboards and the round keycaps and short travel take getting used to. It has no backlight.
Logitech Pebble Keys 2 K380s
A compact Bluetooth keyboard with round keys, three device slots and AAA batteries rated for up to 36 months. It detects macOS over Bluetooth and remaps its modifier keys.
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Tonal Graphite, English US, part 920-011775. Also sold in Tonal Rose and Tonal White. Ships with two AAA batteries installed and no USB receiver.
Tonal Graphite, English US, part 920-011775. Also sold in Tonal Rose and Tonal White. Ships with two AAA batteries installed and no USB receiver.
What works. What doesn't.
Connections
Logitech lists Bluetooth Low Energy with Easy-Switch for three devices, two AAA batteries rated at up to 36 months, and compatibility with a Logi Bolt receiver that is not included.
Layout
Over Bluetooth it detects the operating system and remaps its split modifier keys. On a Bolt receiver, or if detection fails, holding Fn plus O for 3 seconds selects macOS. Logitech lists macOS 11 or later.
Customization
Logi Options+ on macOS customizes ten keys, including the Fn shortcut keys.
Read the bigger picture.
KeyboardsBuying guide
Wireless keyboards for Mac: Touch ID, three-device switching or years on two AAA batteries
Four wireless keyboards for Mac, with what Apple, Logitech and Keychron list for macOS versions, Touch ID, FileVault logins and device switching.