The Viper is the latest mouse from Razer. It is a lightweight peripheral which, as the OEM asserts, is optimized for competitive gaming. It also integrates the 5G Advanced Optical Sensor and Razer Synapse 3.
https://www.notebookcheck.net/Razer-launches-the-Viper-a-new-mouse-for-e-sports.428651.0.html