TechPowerUp checked out the Corsair M65 RGB Ultra Wireless
A quote from the article:
With the M65 RGB Ultra Wireless, Corsair cuts the cord on one of their most popular models. Sporting a durable aluminium frame, Marksman sensor capable of 26,000 CPI, optical switches, weight-tuning system, alleged 2000 Hz wireless polling, and up to 120 hours of battery life using Bluetooth, the M65 is exceptionally rich on features.Corsair M65 RGB Ultra Wireless Review