Is it possible to use an international power adapter for Blueye adapter ?

Yes, you can use an international adapter to plug Blueye adapter to use the Blueye Pioneer. Another alternative is to change the cable that connects to the power adapter (the black brick). This brick accepts input voltage in the range 100-240V, so it is just a matter of replacing the cable from the power adapter to the wall socket. The cable is a standard appliance cable, called IEC 60320-C13 (or simply C13) and can be picked up at most electronics stores or online.