The CLiPtec MobiWave BMH519 headphones are ideal for active, everyday use. It is a durable and high-performance stereo multimedia system for listening to music and calls. The included microphone ensures clear Skype audio, in-game chats, as well as listening to music. The sound characteristics are optimized for a wide range of Ultrabooks, smartphones and tablets. Features: Smooth audio reproduction for stereo sound and great bass. Integrated microphone makes it easy to chat in games, chat on Skype, etc. Flexible and adjustable headband with memory effect. To ensure that each head shape is possible to the best possible adjustment for better comfort. 4-pin audio connection. The 3.5mm jack audio jack (4-pin) ensures perfect and lossless sound for smartphone and tablet. Specification: Transducer diameter: 40mm Speaker impedance: 32 & amp; # 8486; Frequency response: 20Hz - 20KHz Cable length: 1.5m Sensitivity (S.P.L): 98dB +/- 3dB Connector: Jack 3.5mm (4-pin) Weight: 200g Mic. Dimensions: 6 x 1.5mm Directivity: 2.2K & amp; # 8486; Sensitivity (S.P.L): 45dB +/- 3dB