Hello friends, today I will review about to Su kam pure sine wave, I am using su kam pure sine wave inverter for last one year and I am totally disappointed over it. It started to give me some problem after seven month. Right now it is under warranty that's why I am using this but I will say it is a useless inverter. Bits battery is very dull and it seems to be empty soon. This inverter spark too sometime. So I really muffled with it. The purchase of this product is totally wastage of money. This product is not a durable at all. This inverter create many problems then I call the service center 10 to 13 times for its repair they come to repair after 7to 10 days after my call. This inverter is not easily usable. The repairing requirment of this lead to poor performance and effects the usage.