AVR-104 4 port Automatic Voltage Regulation 1000VA Compact design best suitable for computer and office equipments Protection against Brownouts & Over voltages Short Circuit Protection Digital meter indicate regulated output voltage LED indicators to show status of Working, Unusual and Delaying Surge, Spike and Lightning Protection Global Voltage Customization; 220V/230V/240V/110V/115V/120V Input:AC 140V~250V; Output:AC 220V-/+5% Frequency:50Hz/60Hz; Delay Time:6 Secs