Razer is announcing a new gaming mouse, the $169.99 DeathAdder V4 Pro. This fresh version of its popular wireless mouse promises to be faster, lighter, and yet more power efficient than its V3 Pro predecessor. Image: RazerThe new DeathAdder Pro supports up to 8,000Hz polling rate in both wireless and wired modes, thanks to its HyperSpeed Wireless Gen 2 connectivity. Since this mouse is designed for fast-action use in twitchy esports matches, its 45K optical sensor supports up to 45,000 DPI tracking. And the black version of the new DeathAdder weighs just 56 grams, while the model in white weighs one gram more.