The prime intension of using surge device is to protect our valuable instruments from the electrical damages. You can have the best option when it comes to the protection of any electrical products weather it is smartphone or computer. All the electrical instruments can be use for log duration of time. In India JMV LPS LTD is one of the leading manufacturing company of an earthing & lighting protection system. The SPD or surge protection devices how it works. It is basically installed at your home to protect all the electrical devices.