Circle concerto live-203 headset is very nice headphone its availbale in market 475 rupees and online shopping site its availble other different approx 475-500 rupees it very nice headphone its looking was nice and it single wire cable headphone and it sound quality is very nice it perfect for smartphones tablets laptop and mp3 or other equipment and it designed to track noth with bass boost technology concerto comes with an exciting audio experience. its gold plated audi jack providers better connectivity and it flaunts a high sensitive microphone. it comes with flexible headband. it specification is driver is 40 mm driver type NdFeB impedance 32 Sensitivity 105 db S.p. at 1 KHz Frequency Response 16 Hz-20 KHz Power Capability 120 mW Cable length 1.8+ 0.15 m plug type 3.5 stereo microphone microphone unit 6*5mm senstivity -58+3db impedance 2.2 frequency response 3 Hz-16 khz standard operating voltage 3v. circle is concerto live-203 singhle pin headphone its prodoct moto if music is in your blood you become an instument . A choir of notes and tunes imploding through your body into a symphonious rapture. you are the beat. you are the song. if music is in your blood, music will forever live long. so its really very nice product who like music for listing in alone and its give so cute moment with nice bass and trebble the sound quality is very nice