V-Guard VG400 400-Watt Voltage Stabilizer for Air Conditioner (Grey) You can ensure your air conditioner's protection with the new V Guard VG 400 Voltage Stabilizer. This voltage stabilizer has been specifically designed for air conditioners and can handle any AC with a capacity below 1.5-tonnes, ensuring that most home and office ACs are covered by it. To guard your AC against power surges and reductions, V Guard VG offers protection from high voltage as well as low voltage with an automatic cut-off. Moreover, to enhance your AC's life, the V Guard VG AC Stabilizer uses an intelligent time delay system. So, if you're looking to protect your AC, the V Guard Stabilizer VG 400 is the ideal choice for you.