Razer Basilisk V4 Pro mouse costs $169.99
The new Razer mouse features a 200-hour battery and a dedicated AI button, but the redesign pushes thumb controls out of comfortable reach for many users.
By Thiago Kovalenko ·
Razer has released the Basilisk V4 Pro, a refresh to its gaming mouse line that has not seen a major update since October 2024. The new device is priced at $169.99 and is available in black and white. It launched alongside the Mouse Dock V2 Pro, which sells separately for $69.99.
The mouse includes a new Focus Pro 50K optical sensor and fourth-generation optical switches. It supports polling rates up to 8,000 Hz and connects via 2.4GHz wireless, Bluetooth, or USB-C. The design remains right-handed and contoured, retaining the RGB lighting and button layout familiar to previous models.
A key change is the addition of two new buttons, bringing the total count to 12 programmable inputs. One new button sits beside the left mouse button and defaults to switching profiles. Another, the AI button, is positioned in front of the existing thumb controls and opens Razer's AI prompt by default.
Sarah Jacobsson Purewal, senior editor at Tom's Hardware, tested the device and identified ergonomic issues with the new layout. The mouse measures 5.02 inches long. This length places the profile button at the front edge, making it difficult to press comfortably for users with medium-sized hands and long fingers.
The placement of the AI button created further problems for thumb reach. Because it is the same size as the other thumb buttons, it pushes the existing cluster backward. The first thumb button, labeled MB4, became too far away to reach comfortably. Although the buttons can be remapped, Purewal found all three thumb buttons felt slightly off during testing.
The review questioned the necessity of a dedicated AI button on every input device. Purewal noted that the mouse is a strong all-rounder for players who want more functionality than a stripped-down shooter mouse but do not want a button-heavy design. It is positioned between the DeathAdder V4 Pro and the Naga V3 Pro in Razer's lineup.
Weight has decreased in the new model. The black version weighs 3.53 ounces, which is almost half an ounce lighter than the previous Basilisk V3 Pro 35K at 3.95 ounces. While not ultralight, the reviewer noted the device is easier to pick up. The tilt wheel offers two tactile modes with 24 or 48 steps, plus a free-spin mode. The free-spin setting was found to be too sensitive and prone to backscrolling, while the precision tactile mode received praise.
Performance metrics show the 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 or double-clicks in testing. Battery life has increased from 150 hours on the previous model to 200 hours at 1,000 Hz over 2.4GHz. At the maximum 8,000 Hz polling rate, battery life drops to 54 hours.
The box includes a USB-A dongle, an adapter, and a 6-foot braided cable. It does not include one of Razer's flexible HyperFlex cables or grip tape. The Mouse Dock V2 Pro is a wireless charging dock with an integrated 8,000 Hz receiver and eight RGB zones. It also works with several older Razer mice.
Purewal concluded that the mouse offers a good feel and lower weight, but the price and slightly large size are drawbacks. The effect of the AI button on the thumb-button layout remains the most notable compromise in the design.
