After the M4, M42, and MZ1 Wireless, which merely made already established wired mice wireless, Xtrfy presents an entirely new shape with the M8 Wireless. It is not often that I struggle to find comparison mice for a review, but the M8 Wireless is such a case. The best comparison I can come up with is "sized-down Logitech G Pro X Superlight," although this is still more of an approximation than a description. Of particular note is the exceptionally low front, though I found that this has less of an impact than anticipated, as the fingers typically don't sit right at the front, and the main buttons sit significantly higher elsewhere. In any case, it is nice to see Xtrfy innovating and taking risks in the shape department.

When it comes to the mechanical design, Xtrfy has also taken a new approach with the M8 Wireless. Unlike previous Xtrfy releases, which were heavy on RGB lighting and used holes for weight-saving generously, the M8 Wireless does without externally visible holes entirely, and RGB lighting is no longer present, too. Despite the lack of holes, the M8 Wireless weighs no more than 55 g, making it the lightest Xtrfy mouse altogether. More importantly, build quality doesn't suffer: My sample has no creaking or flexing even when pressed, there is no rattle when shaking, and activating the side buttons by squeezing the sides is impossible. Furthermore, the main buttons too have been redesigned and now sit on their own PCB screwed into the top shell. As a result, both pre and post-travel are exceptionally low, and owing to the already familiar Kailh GM 8.0 switches, button response is very firm and satisfying. The side buttons too are great, with minimal pre and post-travel and snappy actuation. The scroll wheel utilizes the same encoder familiar from previous Xtrfy releases and provides excellent tactility in conjunction with low noise levels. The mouse feet are a bit thinner than the ones on previous models, but still glide well, and a replacement set is included once again.

On the hardware side, the M8 Wireless comes with PixArt's latest PAW3395 sensor. The most meaningful difference compared to the PAW3370 of previous Xtrfy releases is the addition of MotionSync, which synchronizes SPI and USB to achieve more consistent SPI timing. Previous releases using this sensor and the CX52850 MCU such as the Pulsar X2/X2 Mini or Fantech Aria XD7 showed MotionSync adding up to 1 ms of motion delay, which is a rather poor trade-off. While the M8 Wireless is using the same sensor and MCU, the latency added by MotionSync is lower, and roughly on par with the LAMZU Atlantis. Thankfully, the M8 Wireless also allows turning MotionSync off, giving users the choice. Regardless of MotionSync, performance is expectedly excellent: Very low CPI deviation, great tracking, and stable polling, aside from polling rates below 1000 Hz in wireless mode, which is a known flaw of the MCU. Wireless sensor motion delay is just 1 ms, no doubt owing to the included wireless extender as well. Click latency too is within the expected boundaries, sitting at 4.9 ms in wireless mode when using the lowest debounce time value (2 ms). As with other mice using this MCU, without any sensor or button input for five seconds, the next click after will have slightly increased latency (roughly 8 ms instead of the 4.9 ms on average). While I consider this a non-issue, Xtrfy has released a firmware disabling this behavior entirely, though this will also affect battery life negatively. As always, it is good to have the choice at least.

Speaking of, Xtrfy cites a battery life of 75 hours, which is the same as previous releases with the PAW3370. However, where previous models used a 500 mAh battery, the M8 Wireless is only using a 300 mAh one. Since the PAW3395 is only marginally more power-efficient than the PAW3370, there is no way the M8 Wireless could last the same 75 hours. Given the difference in battery size, I'd expect the M8 Wireless to clear the 50 hours mark, but not more. Charging at least is reasonably fast, and the charging cable is flexible enough to allow charging while playing. The only irritating part when doing so is the position of the USB connector on the mouse, which has been moved to the right side, as the very low front doesn't have enough space. Surprisingly enough, I got used to the uncommon position pretty fast, and didn't find myself bothered by it during play.

As with previous Xtrfy mice, configuration is done entirely on the mouse. The lack of RGB has allowed Xtrfy to implement certain functions without button combinations, such as Debounce Time, which now can be changed at the press of a button. A small LED at the side of the mouse indicates any changes, and the same LED will also display the current charge status of the battery upon a certain button combination. The whole process is as convenient as it is easy.

Overall, the M8 Wireless is yet another excellent release from Xtrfy. I'm particularly pleased that unlike Pulsar with the X2/X2 Mini, Xtrfy doesn't charge anything extra over the previous PAW3370 generation for the new sensor, while keeping the quality up everywhere else. Furthermore, its shape is unique to where the M8 Wireless doesn't have much competition altogether. As such, the M8 Wireless earns our Editor's Choice.