PowerShield PSVG1500 VoltGuard 1500VA / 750W, AVR - 750 Watt Voltage Stabliser, No internal batteries, 2 Year WarrantyThe PowerShield VoltGuard AVR will automatically maintain a constant voltage level to protect sensitive electronics from brownouts and over voltages. This cost effective compact device will provide a constantly regulated output voltage ensuring that your sensitive electronic equipment is always receiving voltage within an acceptable range. Furthermore, this VoltGuard also has included as standard, over voltage and under voltage protection which will