Razer Basilisk V4 Pro review: many controls, awkward reach

The Razer Basilisk V4 Pro is a feature-packed wireless gaming mouse for players who want an ergonomic right-handed shape, a thumb rest, and lots of programmable controls. The trade-off is reach: Tom’s Hardware reviewer Sarah Jacobsson Purewal found that the added thumb button pushed a frequently used control farther back, while the extra button near the main click felt too far forward for her. The wheel drew a more favorable response. If you prioritize a light mouse or rely on every side button landing exactly under your thumb, its layout deserves a closer look before buying.

Comfort, thumb reach, and the scroll wheel

The Basilisk V4 Pro’s sculpted body and thumb rest suit a fuller, right-handed grip. Its black version is listed at 100 g, and its dimensions are 127.5 × 75.8 × 42.5 mm. The white model’s published weight figures conflict, so the black model’s measurement should not be applied to it.

The mouse has 12 programmable buttons, or 14 controls when scroll up and scroll down are counted. Its three default side-button assignments are AI Prompt Master, Mouse Button 5, and Mouse Button 4, from front to rear. Razer says those assignments can be changed in Synapse.

Purewal’s main ergonomic reservation was how the new controls affected thumb reach. She found the added thumb button pushed Mouse Button 4 farther back, and said the extra control at the edge of the main button was too far forward for a normal action. She also noted that users who lift the mouse often may trigger the multi-function thumb control by accident. Those are specific reviewer observations, but they point to a practical question: will your thumb naturally land on the controls you use most?

The four-way tilt wheel gives you a choice of 24-step tactile scrolling, finer 48-step Precision Tactile scrolling, free-spin, and Smart-Reel, which switches between tactile and free-spin modes. Purewal found free-spin too sensitive and preferred the 48-step mode. That makes the wheel a strong part of the feature set for players who switch between deliberate menu selections and fast scrolling.

Sensor and battery life depend on the mode

Razer specifies a Focus Pro 50K Gen-3 optical sensor rated for up to 50,000 DPI, 930 IPS tracking speed, and 90 G acceleration. DPI describes sensitivity; IPS is the maximum tracking speed in inches per second. Razer also specifies polling rates up to 8,000 Hz in wired and wireless modes. Polling rate is how often the mouse reports its position to the computer.

The battery figures vary sharply with connection and polling rate. Tom’s Hardware reports Razer’s 200-hour rating at 1,000 Hz over 2.4 GHz and a 54-hour rating at 8,000 Hz. Razer separately claims up to 275 hours over Bluetooth 6.2, depending on use and settings.

For everyday use, the 200-hour figure belongs to the 1,000-Hz 2.4-GHz mode. Choosing 8,000 Hz cuts the stated figure to 54 hours, so the maximum polling rate comes with more frequent charging.

AI Prompt Master and what Synapse controls

The AI Prompt Master button does not have to stay assigned to AI. Razer says its buttons can be remapped in Synapse, and AI Launcher requires Synapse to be running. In their own reviews, William Judd reported a ChatGPT verification error with a text prompt and no result from an image-generation attempt; Baden Ronie found the templates of limited use in his setup and preferred to remap the button. Those reports describe individual experiences, not a universal result.

Razer’s manual says up to five profiles can be stored on the mouse and used on another computer without Synapse installed. Lighting effects are not stored onboard, while AI Launcher and Perfect 180 require Synapse to run. Perfect 180 is Razer’s feature for a rapid 180-degree turn; Razer says its behavior depends on in-game sensitivity and Synapse settings.

The distinction matters if you prefer not to keep configuration software installed. A stored button profile can travel with the mouse, but it does not carry the lighting effects, and the AI and Perfect 180 functions rely on Synapse running.

US price and the optional charging dock

As of October 25, 2026, Razer’s US store lists the Basilisk V4 Pro starting at $169.99. The Mouse Dock V2 Pro is a separate purchase; Tom’s Hardware reported its price as $69.99. Razer identifies the dock and HyperFlux V2 as optional wireless-charging accessories. The dock also has an integrated 8,000-Hz receiver, according to Tom’s Hardware.

The mouse can also connect over Bluetooth 6.2, 2.4-GHz HyperSpeed Wireless Gen-2, or USB-C wired mode. Razer says Bluetooth can pair with up to three devices. Its manual lists the Mouse Dock V2 Pro and HyperFlux V2 as charging options.

Should you buy the Basilisk V4 Pro?

Consider it if you want a right-handed mouse with a thumb rest, extensive controls, several connection options, and a wheel that can shift between precise steps and free-spin. Its strongest practical case is versatility, especially if you will use the extra buttons and configure them to suit your games.

Think twice if your priority is a light competitive-FPS mouse or if awkward thumb reach would disrupt your usual actions. The AI feature is optional as a button assignment, but it depends on Synapse and reviewers reported mixed results in their own setups. If you already use a Razer Basilisk V3 Pro 35K, Tom’s Hardware lists the black V4 Pro at 100 g and the V3 Pro 35K at 112 g; the reviewer’s separate battery figures and conditions are not a like-for-like comparison. For a current owner, the new mouse makes the most sense when its specific controls, sensor rating, or wheel modes solve a real need in your setup.