Detailed review of the Razer Viper 8KHz - shape overview, performance testing, teardown, etc. : r/MouseReview
Razer Viper Ultimate - Wireless Gaming Mouse with Charging Dock | Razer Europe
Razer's Viper V2 Pro mouse gets rid of all the fluff
Amazon.com: Razer Viper Ultralight Ambidextrous Wired Gaming Mouse: 2nd Generation Optical Mouse Switches 5G Optical Sensor - 71g Lightweight Design - Speedflex Cable - Mercury White : Video Games
New Razer Viper is called the Razer Viper V2 Pro (release date stated to be the 26th of April, no idea if this is even accurate for Romania) : r/MouseReview
Razer Viper Mini Mouse Lightweight Gamer Mouse Advanced Optical Sensor Gift for Gamer Pro Player Computer Laptop Gaming - Walmart.com