Sony Sbh70 Water Resistant Sports Bluetooth Headset with NFC (White) Design: In-ear ergonomic headphones, Lightweight, Behind-the-neck wearing Sound: Echo, Wind, and Noise Cancellation; HD Voice; Voice Commands Water-Resistance Rating of IP57 - so make a call in a downpour, take a walk in the rain, or drop your headset in the sink without worrying Features Multi-point connectivity, Bluetooth voice-activated dialing, Vibrator for notifications, NFC One-Touch & Smart Memory Metal Acoustics - Speaker Type: 14mm Dynamic, Ear Coupling: in-ear with increased comfort (vented acoustical design), Frequency Response: 35 Hz... 18000 Hz (diffuse field oriented mid-high range for dynamic and clear audio experience), Max SPL: 100 dBA (EN 50332-1), Total Harmonic Distortion: &lt;1% (200 Hz...) 8000 Hz @ 100 dDBSPL, Microphone: ECM (HD Voice Compliant)