Razer DeathAdder V2 X HyperSpeed Optical Wireless Gaming Mouse. Over 13 million DeathAdders sold. Ultra-fast Razer™ HyperSpeed Wireless. With up to 235 hours of seamless low-latency gaming with Razer™ HyperSpeed Wireless, and up to 615 hours with Bluetooth, the mouse can go for ages before its battery needs replacing.
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