The device indicates input of 220VAC.
I.e, if you are in the USA or any other place that provides 110VAC from the wall it is Not a good idea to use it.
Otherwise, it seems to be a 12VDC 250MA power plug.
Such a device worth "pennies" and there is No reason to risk anything using it unless you are on one of the "TV Lost"
episode and that is the only thing that you have.