Microtek EM4160+ - 160 to 285 V Metallic Grey Voltage Stabilizer - It is made for protecting air conditioners up to 1.5 ton against voltage fluctuation. It is energy efficient with power-saving technology; thus, it provides high performance. It has an auto-start option that allows routinely step up and step down output voltage as per the input voltage. It has an advanced seven segment digital display that indicates input and output voltage. It has an ergonomic wall mounting design for easy installation. It is a better reliable option during a frequent power cut and voltage fluctuation.