Buyer Beware. DPI is what every other manufacture uses. CPI is what Steelseries uses for marketing purposes.
Steelseries has gone nowhere but downhill in quality control. I'm never spending another dollar with this company. The screwed me on a 200$ headset. Everyone I know that has bought a mouse with them, has had nothing but problems. I admit the super old Siberias were good and sturdy, but their new stuff is Chinese junk.