Vortex Gaming

· The Razer Viper V4 Pro package includes a dongle, the mouse itself, a cable, stickers, and grip tape; spare mouse feet are not included.
· Visually, it's very similar to the Viper V3 Pro, with minor differences in the coating feel and scroll wheel design (V3 Pro has ridges, V4 Pro has horizontal lines).
· The side buttons are the same as the V3 Pro. Due to the sensor change, the bottom shape is slightly narrower with rounder mouse feet.
· The edges of the mouse feet have more rounding.
· The weight has decreased from 54.3g for the V3 Pro to 48.9g for the V4 Pro, a reduction of about 5g. The white model is 1g heavier due to the paint.
· The shell design remains the same as the V3 Pro, which is good news for users who liked the V3 Pro's shell.

· The Viper V4 Pro is equipped with a new sensor, different from the previous PAW 3395 and 3950 sensors. It appears to be a new type, possibly similar in form to Logitech's HERO sensor.
· It's speculated that Razer hasn't just slightly improved the existing sensor but has adopted a new form factor, even changing the external appearance.
· Razer's emphasized 0.36ms sensor latency is achieved through a new technology called 'Frame Sync'. This is different from Motion Sync and unifies the sensor capture cycle, PC polling, and MCU data processing to shorten response times.
· This technology is similar to Logitech's HERO sensor's variable FPS feature and also contributes to improved battery efficiency.
· Instead of the previous Nordic chip, an ARM-based AIROHA AB1623MN chip is used for the MCU, though detailed information about this chip is limited.
· The application of such proprietary technology differentiates it from other Chinese-made mice.

· The optical scroll wheel is the same as the one on the DeathAdder V4 Pro, offering a very quiet and smooth user experience. Compared to the somewhat rough feel of the V3 Pro, it's an improvement, striking a good balance between tactile feedback and noise.
· The click switches have been upgraded from the 3rd generation to the 4th generation optical switches.
· The 4th generation optical switches are highly praised for their excellent click feel, surpassing mechanical switches, and the 'hollow' sound during clicks has been significantly improved compared to the 3rd generation.

· Despite its lightweight design, the Viper V4 Pro features a very robust internal structure. It's so sturdy that even when lifting the bottom and pressing the top, there's no flex.
· This level of structural integrity is comparable to Logitech's top-tier models.

· For the first time in a Razer mouse, it supports a web driver, allowing mouse settings to be configured with minimal resource usage.
· Click response time is measured at around 0.3ms even at 8K polling rate, demonstrating top-tier performance. It also includes slam click prevention.
· Sensor response time doesn't exactly match the manufacturer's stated figures due to differences in measurement methods, but overall performance is fast.
· The LOD (Lift-Off Distance) minimum was measured at 0.6mm.

· Despite having the same 306mAh battery capacity, the Viper V4 Pro boasts significantly improved battery efficiency thanks to the Frame Sync technology and the new MCU.
· At 8K polling rate, usage time has increased from the previous 17 hours to 45 hours, nearly a threefold increase.
· The MCU is the ARM-based AIROHA AB1623MN chip, which contributes to enhanced power efficiency.

· The launch price of the Viper V4 Pro is 249,900 KRW, a 10,000 KRW increase compared to the Viper V3 Pro.
· This is still cheaper than the DeathAdder V4 Pro's launch price (259,000 KRW).
· For existing Viper V3 Pro users, an upgrade might not be essential, but for new buyers, the V4 Pro is highly recommended.
· Especially the outstanding battery efficiency at high polling rates will provide a significant perceived performance improvement.