I think you need to buy surge suppressor. From wall outlet diba you'll need extension wire for your PC, Printer, Speaker, etc. Why buy extension wire when you can use surge suppressor instead. I suggest also not to use AVR, use UPS. Having AVR, UPS surge suppressor is too much especially if you have main circuit breaker. Your House circuit breaker will trip if ever naay power fluctuation. your surge suppressor protects your PC for voltage spikes then if naa ka importante routine like office works, you'll need UPS for you to save your files if ever naa brown/black out.