How can I change the DPI and polling rate on ZOWIE wireless mice?

The DPI and the polling rate button is on the bottom of all ZOWIE wireless mouse models.

U2:

Press button 6 to switch DPI to your preference: 400/800/1000/1200/1600/3200

Press button 7 to switch the polling rate to your preference: 125Hz/500Hz/1000Hz

FK2-DW/ZA13-DW/S2-DW/U2-DW: 

Changing DPI setting: 

Press DPI button from the bottom of the mouse repeatedly to cycle through different DPI options, You can tell the current setting by the LED indicator above the button.

Adjusting polling rate:

Press polling rate button from the bottom of the mouse repeatedly to cycle through different polling rates. You can tell the current setting by the LED 

indicator above the button. Available polling rates vary according to the receiver (enhanced or USB) used. Note that more battery power is consumed with a higher polling rate. 

Polling rate LED indicator on enhanced receiver: When a high polling rate (either 2000 Hz or 4000 Hz) is set, the polling rate LED indicator lights up green. High polling rates increase power consumption. You can tell the exact setting by the LED indicator above polling rate button.