The tvp-13amps automatic appliance protector,prevents damage to electrical and electronics appliances from power flutuations,typically of high voltage levels of short and long durations. When mains power supply fluctuates outsids the pre-set levels (normally 140v-280v), the power to your equipment is automatically disconnected by the automatic appliance protector. The protector then monitors the incoming power supply for a duration of 6s to 300s max to ensure power stabilizes before reconnecting power to your eguipment. Furthermore, the automatic appliance protector incorporates a start-up delay function which provides protection against power-back surges and spikes commonly experienced when power is restored after power cuts. Operation- mode button press the mode button 1s each time to see following default settings p-1delay time value.P-2 high voltage value.P-3 low voltage value.P-4 over current value