TechPowerUp published a review on the ASUS TUF M4 Wireless
A quote from the article:
With the ambidextrous TUF M4 Wireless, ASUS adds a budget option to their wireless roster. Capable of 2.4 GHz or Bluetooth operation, the 62 g M4 Wireless can be used with an AA or AAA-battery. PixArt's 12,000 CPI PAW3311 sensor, a PBT top cover, and pure PTFE feet round things off.ASUS TUF M4 Wireless Review
