Razer Basilisk V4 Pro: 12 buttons and a 100-gram shell
The new mouse costs $169.99 and offers 200 hours of battery life, but the added AI key crowds the thumb controls.
By Pedro Barnes ·
Razer released the Basilisk V4 Pro on Thursday. The mouse is the first major update to the line in two years. It replaces the Basilisk V3 Pro 35K, which launched in October 2024. The new model retains the right-handed, contoured shape and bright RGB lighting of its predecessor.
The device features the Focus Pro 50K optical sensor. It supports polling rates up to 8,000 Hz and uses fourth-generation optical switches. Connectivity options include 2.4GHz wireless, Bluetooth, and USB-C. The retail price is $169.99 in black and white colorways.
The primary physical change is the addition of two new controls. The total count of programmable buttons now stands at 12. One new button sits beside the left mouse button. By default, this key switches profiles. The second new button is a third thumb key positioned in front of the existing pair. It opens Razer's AI prompt interface by default.
Senior editor Sarah Jacobsson Purewal of Tom's Hardware tested the unit. She reported that the profile button is located at the front edge of the mouse. The device measures 5.02 inches long. For users with medium-sized hands and long fingers, this placement makes the button difficult to press comfortably. Purewal noted that the new AI button is the same size as the other thumb keys. Its presence pushes the existing thumb cluster backward. The first thumb button, designated MB4, became too far away to reach without strain. Although the buttons can be remapped, Purewal found that all three thumb buttons felt slightly awkward to use.
The weight of the black version is 3.53 ounces, or 100 grams. This is a reduction of 12 grams compared to the V3 Pro 35K, which weighed 3.95 ounces. While the drop makes the mouse easier to pick up, Purewal stated it is still far from ultralight. The tilt wheel offers three modes: 24-step tactile, 48-step tactile, and free-spin. The free-spin setting proved too sensitive and prone to backscrolling, while the precision tactile modes received praise.
Battery life has increased from 150 hours on the previous model to 200 hours. This figure applies to usage at 1,000 Hz over 2.4GHz wireless. At the maximum 8,000 Hz polling rate, the battery lasts 54 hours. The Focus Pro 50K sensor reaches 50,000 DPI and 930 IPS. It tracks on most surfaces, including glass at least 4mm thick. The switches are rated for more than 100 million clicks and produced no misclicks in testing.
The Basilisk V4 Pro launched alongside the Mouse Dock V2 Pro. The dock sells separately for $69.99. It features an integrated 8,000 Hz receiver and eight RGB zones. The dock is compatible with several older Razer mice. The box includes a USB-A dongle, an adapter, and a 6-foot braided cable. It does not include one of Razer's HyperFlex cables or grip tape.
Purewal recommends the mouse for players who want more functionality than a stripped-down shooter mouse but do not want a button-heavy design. The review lists the feel, lower weight, and battery life as strengths. It cites the AI button's effect on thumb-button layout, the price, and the slightly large size as drawbacks. The device sits between the DeathAdder V4 Pro and the Naga V3 Pro in terms of button count and utility.
