This mouse is used but in great condtion. This Logitech G602 is a wireless optical gaming mouse with 11 programable buttons and up to 250 hours of battery life on two (2) AA full charge. It work great with rechargable batteries. I didn't have to replace the bateries for more than a week of constant usage. This mouse have two mode, performance and and endurance. It indicate by the color blue (performance) and green (endurance).