APC Back-UPS BX600C-IN 600VA / 360W, 230V, UPS System, an Ideal Power Backup & Protection for Home Office, Desktop PC & Home Electronics

From the manufacturer

Compact Design Line Interactive UPS with Load Capacity of 360Watts / 600VA. Output Frequency (sync to mains) : 47 – 63 Hz Sync to mains
Three Battery Backed up and Surge Protected 6A, 2/3 Pin Output Indian Power Socket
Automatic Voltage Regulator (AVR) with Wide Input Voltage Range 145-290V, Transfer Time – 10 ms typical : 12 ms maximum
1×7.2Ah Battery provides 20 – 75 min. Back-Up time *as per the load
Generator Compatible; Compatible with low power loads e.g. Wi-Fi router, DSL modem
Cold start capability allows the load to power on just on battery; Stays quiet during a changeover from mains to generator