I Bought this 2 months ago on flipcart.when I connect with my desktop with this UPS, SMPS( switched -mode power supply) burnt and also my LED monitor adapter burnt.everything connected to this UPS gets burnt.can’t handle fluctuations.backup time is not even 2 minutes.it give too short power backup for my pc.automatic switching is not happening.once power goes UPS will off and then get on.also it has a modified sine wave inverter, not pure sine wave.it running as a speaker on this will cause all sorts of buzzing noise.probably the reason why they sell it for less price because the battery is very old and useless.totally dis satisfied with this.