Automatic mainline stabilizer is designed to be connected direct to the mainline and stabilize the voltage when it falls or go above. This compact design Servokon stabilizer has indicators and controls, like trip indicator, and by-pass switches. This is used mainly in homes and protect appliances, such as air conditioner, deep freezer, television system and refrigerator. It is capable of achieving +/-9% precision in power supply. One can take help of a skilled electrician to get automatic mainline stabilizer installed on your main power line.