JBL T250SI, I brought it from Amazon.com for 1k on january 2015 and still it is working in good condition. I was serching for headphones with good sound quality and durable and I found this and buy it. My choice was right. JBL is establish company in India for sound system. Its inner frame is of plastic and case is of plastic, which makes it durable. The design is quite okay. Connectivity is of standard 3.5mm plug. It is powered by dynamic drivers that is tuned for bass boast and frequency response rate is 20-20k hz and impedance is 320 ohms. The sound quality is good. Its price is quite affordable. It is for 990 but you can buy for 650 in sale from amazon or flipkart. If you want to buy headphones of good sound quality and durable, then JBL T250SI is great choice.