The gain of the amplifier is simply -R3/R1.
C1 and C2 determine the lower and upper cut-off frequencies respectively.
[latex]F_{C_{lower}} = \frac{1}{2\pi R1 C1}[/latex]
[latex]F_{C_{upper}} = \frac{1}{2\pi R1 C2}[/latex]
I don't know what R2 does, it will reduce the gain but not by much as it's at a vitual earth potential, I'd remove it if I were you. If you want add a resistor to limit the effect of the bias currents then it should be the same value as R3 and be inbetween the +input and 0V.