You don't need Synapse for using Deathadder. It's just good to have because you'll be able to configure it. But you can use it without Synapse if you would like to, just like any other mouse.
You don't need Synapse for using Deathadder. It's just good to have because you'll be able to configure it. But you can use it without Synapse if you would like to, just like any other mouse.