Westone W20 Dual-Driver True-Fit Earphones and similar items

Product Overview Offering dual balanced-armature drivers with passive crossover, the W20 (Generation 2) from Westone is ideal for all personal audio and video devices. The W20's build uses separate low-frequency and high-frequency drivers to deliver enhanced sonic detail and extended frequency response. The flat sound signature of the Westone W20 is ideal for those music lovers who dont want their listening experience colored by excessive low-frequency information. Includes W20 Universal-Fit Earphones 3-Button Cable with Microphone Westone Bluetooth Cable 5 Pair Patented STAR Silicone Tips 5 Pair True-Fit Foam Tips Exchangeable Faceplates Premium Small Carrying Case 2 Year Limited Warranty Features TRUE-FIT TECHNOLOGY: 60 years of experience designing products for the ear, has resulted in a universal-fit earpiece that is compact, low-profile, lightweight, and extremely comfortable. Westone's proprietary eartips enhance the performance of the W20 by ensuring a great fit and seal, right out of the box BALANCED-ARMATURE DRIVERS: Westones proprietary balanced-armature drivers provide enhanced sonic detail and frequency range that extends well beyond other in-ear solutions BLUETOOTH CABLE: Full-resolution Bluetooth Cable uses aptX technology to deliver extraordinary detail, clarity, and a dynamic soundstage that has to be heard to be appreciated. The Westone Bluetooth Cable features; 8 hours of battery life, a 10 meter/ 32 foot range, has a water and dust resistant IPX-4 rating, and features their exclusive MMCX Audio connectors, which allows the Bluetooth Cable to be used with any custom-fit or universal-fit earpiece 3-BUTTON MFI CONTROL SYSTEM + MICROPHONE: 55 MFi Cable with MMCX Audio connector features a Microphone controller that is compatible with iPhones, iPods, and iPads and features volume +/-, tracking +/-, phone answer, and Siri activation. Specification Sensitivity: 117dB SPL @ 1mW Frequency Response: 20 Hz - 18 kHz Impedance: 33 ohms @ 1 kHz Passive Noise Attenuation: 25dB Driver: Dual Balanced- Armature Drivers with Passive Crossover Cable: MFi / Bluetooth Cable Length: 55 (139 cm) / 27.5 (70 cm)