This device is not reliant on electronics, so Kilg%re's powers would not work on it. The user uses the scepter to strike a surface which will then produce a powerful sonic wave similar to those used by Izzy Bowin.
Ralph used his elastic body to form a mold for the sonic scepter, so that he could store it in his body for use at a second's notice and managed to use the device on DeVoe. Having DeVoe incapacitated, Ralph contemplated killing DeVoe, but he ends up resorting to cuffing DeVoe instead.
However, once DeVoe took over Ralph Dibny's body, the device was rendered useless.