Enjoy your music in quality stereo with the Nokia WH-901 Stereo Headset. Designed for comfort, this lightweight earphones fit comfortably in your ear for long time usage. Switching/Making calls is easy with the answer/end key on the built-in remote control. With this headset, sound quality is never in question. Specifications: Dimensions Control unit (max): 20 mm x 5 mm, Earpieces (max): 30 mm x 16 mm x 15 mm and Plug (max): 30 mm x 5 mm Weight: 13 g Operating keys: Answer/end key Connectors: 3.5 mm Nokia AV connector Operating temperature -15°C to +55°C Cable length 1180 mm Sounds Specifications: Impedance (for wired headsets only): 32 ohms Total harmonic distortion (average over 200 Hz -2 kHz): 0.5 % Speaker diameter: 14 mm Microphone diameter: 3 mm Wearing concept: symmetric Earpiece concept: intra-concha Transducer principle (e.g. dynamic): dynamic Compatible with the Nokia Astound, 2730 classic, 3600 slide, 3711, 5130 XpressMusic, 5220 XpressMusic, 5230, 5230 Neuron, 5310 XpressMusic, 5530 XpressMusic, 5730 XpressMusic, 5800 XpressMusic, 6210 Navigator, 6700 slide, 700, 7020, C3, C6, Astound C7, E5, E51, E63, E72, E73 Mode, E75, E90 Communicator, 700, Lumia 710, Lumia 810, Lumia 820, Lumia 822, Lumia 900, Lumia 920, N76, N8, N79, N81, N81 8GB, N82, N85, N95, N97, N97 mini, X3 and X6 phone models.