Advanced Technology and Remote Controlled. The Symphony air cooler Diet 50 T uses advanced dura-pump technology with a highly efficient honeycomb cooling pad to absorb heat from the room. . To uniformly spread cool air around the room, this device has an auto louver movement with an auto swing option.before I buying symphony diet 50t I was seen all the features and then I buy it rupees 8, 900 only. . Symphony Diet 50T is a good Cooler compare to other company coolers, In my case Service is good from the dealars