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Why does my wireless mouse failing to update firmware and unable to power on?

To ensure that firmware updates are successful, it is important to pay attention on:

 ．The firmware update requires a wired connection to the PC.

 ．Do not connect two mice, USB receiver, and enhanced receiver simultaneously
     during the update.

 ．Do not disconnect the cable until the update is complete.

Applicable Models

EC1-DW, EC2-DW, EC3-DW, FK2-DW, S2-DW, U2-DW, ZA13-DW

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