Sensor and Performance

The Glorious Series 2 Pro Wireless is equipped with the BAMF 2.0, which essentially is a PixArt PAW3395. According to specifications, the 3395 is capable of up to 26,000 CPI, as well as a maximum tracking speed of 650 IPS, which equals 16.51 m/s. Out of the box, four pre-defined CPI steps are available: 400, 800, 1600, and 3200.

All testing was done on the latest firmware (1.0.2.0). As such, results obtained on earlier firmware versions may differ from those presented hereafter.

CPI Accuracy

I've restricted my testing to the four most common CPI steps, which are 400, 800, 1600, and 3200. As you can see, deviation is consistently positive and large, which is a below average result overall. In order to account for the measured deviation, adjusted steps of 400, 750, 1500, and 3000 CPI have been used for testing.

Motion Delay

Wired testing

First, I'm looking at two xCounts plots—generated at 1600 and 26,000 CPI—to quickly gauge whether there is any smoothing, which would be indicated by any visible "kinks." Neither plot shows any kinks, strongly suggesting there not being any smoothing across the entire CPI range.


The Series 2 Pro Wireless also allows enabling MotionSync, which effectively synchronizes SPI reads with USB polls, resulting in very low SPI timing jitter as seen above.



In order to determine motion delay, I'm looking at xSum plots generated at 1600 and 26,000 CPI, both without (first row) and with (second row) MotionSync. The line further to the left denotes the sensor with less motion delay. Without MotionSync, there is no motion delay differential at 1600 and 26,000 CPI. With MotionSync, a motion delay differential of around 0.5 ms is added.

Wireless testing


Not much changes when running the Series 2 Pro Wireless in wireless mode as SPI timing jitter and general tracking are virtually on the same level as when wired, both without (first row) and with (second row) MotionSync.



Once again, 1600 and 26,000 CPI are tested, both without (first row) and with (second row) MotionSync. Without MotionSync, there is no motion delay differential at 1600 and 26,000 CPI. With MotionSync, a motion delay differential of around 0.5 ms is added.

Speed-related Accuracy Variance (SRAV)

As you can see from the plot, no displacement between the two cursor paths can be observed, which confirms that SRAV is very low.

Perfect Control Speed

I've only managed to hit a measly 5.5 m/s, which is within the proclaimed PCS range and causes no observable sensor malfunction.

Polling Rate Stability

Wired testing


All the available polling rates (125, 250, 500, or 1000 Hz) are stable.

Wireless testing
For wired mice, polling rate stability merely concerns the wired connection between the mouse (SPI communication) and USB. For wireless mice, another device that needs to be kept in sync between the first two is added to the mix: the wireless dongle/wireless receiver. I'm unable to measure all stages of the entire end-to-end signal chain individually, so testing polling-rate stability at the endpoint (the USB) has to suffice here.


First, I'm testing whether SPI, wireless, and USB communication are synchronized. Any of these being out of sync would be indicated by at least one 2 ms report, which would be the result of any desynchronization drift accumulated over time. I'm unable to detect any periodic off-period polls that would be indicative of a desynchronization drift, though bouts of elevated noise are common.



Second, I'm testing the general polling-rate stability of the individual polling rates in wireless mode. Running the Series 2 Pro Wireless at a lower polling rate can have the benefit of extending battery life. All polling rates display periodic bouts of elevated noise.

Paint Test

As you can see, no issues with angle snapping can be observed. There is no jitter visible at 1600 CPI, but 10,000 CPI already shows minor to moderate jitter, which is amplified to major levels at 26,000 CPI. This is in line with what to expect from a sensor lacking any smoothing. Lastly, there is no lens movement.

Lift-off Distance

The Series 2 Pro Wireless offers two pre-defined LOD levels. In theory, at the "1 mm" setting, the sensor will not track at a height of one DVD (<1.2 mm), whereas at the "2 mm" setting, the sensor will track at a height of one DVD, but not at a height of two DVDs (1.2<x<2.4 mm; x=LOD height). However, this setting is bugged, which is why it always defaults to 2 mm as long as Glorious Core is running, and if Glorious Core is not running, the 1 mm setting is sometimes retained and sometimes not. Keep in mind that LOD may vary slightly depending on the mousing surface (pad) it is being used on.

Click Latency

In wired mode and at a debounce time of 0 ms, click latency has been measured to be 0.6 (0.63) ms, with standard deviation being 0.32 ms. In wireless mode, at 1000 Hz, and at a debounce time of 0 ms, click latency has been measured to be 1.1 ms, with standard deviation being 0.35 ms. In wireless mode, at 2000/4000/8000 Hz, and at a debounce time of 0 ms, click latency has been measured to be 0.8 (0.80) ms, with standard deviation being 0.35 ms.