Don’t risk losing your valuable equipment through lightning, protect it with the Surge Pro Plug. Lowest clamping voltage is 300 volts, (the voltage level at which the surge is stopped and is dropped to a safe level). Where other surge protectors clamp between 700 and 800 volts. 6 Stage Surge Protection. 3 MOV’s and 3 Gas Arrestors (Neon). Absorbs up to 16 500 Amps on live and neutral and up to 13 000 Amps on earth.