The optimal fit for your hand: This comfortable full size mouse is designed for larger hands, for the optimal fit Upgrade your comfort: This work mouse provides long hours of comfort thanks to a contoured shape, soft thumb area, and rubber side grips that keep your hand snug and in place Connect the way you like: Connect this cordless computer mouse in an instant via Bluetooth Low Energy or Logi Bolt USB receiver 24 month battery life: Work for up to 2 years on the single AA battery that comes with your multi-device mouse