Lift your wrist into an ergonomic, handshake position for all-day comfort. The vertical design prevents unnecessary wrist movements and the thumb rest and softly textured grip give extra support. Compared to some ergo mice, this one is nice and compact and it's a perfect fit for small to medium-sized hands. It's optimized for Macs and works with iPadOS. The clicks are super-quiet and the SmartWheel has precision and speed modes. Customize 4 buttons, build app-specific profiles, and turbo-charge your Mac's workflow with Logi Options+. This version works perfectly over Bluetooth and connects to up to 3 devices. The included AA battery lasts up to 2 years. Please note: iPadOS does not support software-based functions such as Logi Options+ customisation.