HIFIMAN is an established market leader in full-size planar magnetix headphones as well as in-ear phones. The missing piece in the puzzle has been anon-ear model. That is until now.Enter the Edition S Open/Closed Back On-Ear Dynamic Headphones. In the company"s long-established tradition of creating remarkable performance for the price the Edition S establishes a new benchmark for others to follow. FeaturesHigh Performance - With a sensitivity rating of 113dB and impedance of 18 ohms the Edition S can be driven by most portable audio devices and it sounds simply great doing it!Open/closed back design - HIFIMAN gives you the best of both worlds with an on-ear headphone that can go from one more to the other simply by adding or removing the logo cap on the ear cup.Portable and foldable - Only 8.74 ounces the Edition S can be easily folded and stored in its supplied travel case. Ideal for music lovers on the go.iOS/Android in-line cable - For added convenience use Edition S with either an Android or iOS device.What"s in the Box:Edition S Open/Closed Back On-Ear Dynamic Headphones1.5m headphone cable (3.5mm plug)3m headphone cable (6.35mm plug)One pair of earphones (mounted on headphone)SpecificationsStyle: Open/Closed BackFrequency Response: 15Hz-22kHzSensitivity: 113dBImpedance: 18 ohmsDriver Size: 50mmWeight: 8.74 oz