Telecom and data equipment are susceptible to over voltage and also to surges/spike transmitted down the telephone lines especially due to lightning. The LightningGuard combines protection against over voltage (like the HivoltGuard) by disconnecting the power to the equipment when it goes above acceptable level.

Additionally, the LightningGuard  adds data line protection that clamps surges/spikes transmitted through telephone lines. Like the HivoltGuard, it has a built in delay when power returns to normal. This will ensure that the appliance is not switched on-off repeatedly during fluctuations nor it is subjected to a massive surge normally experienced when power returns after power cuts.