The ATH-CKS550BT Solid Bass wireless in-ear headphones give you the convenience of Bluetooth® and NFC wireless technologies, plus crystal-clear audio with refined bass reproduction. The powerful 9.8 mm Dual Magnetic-Field Drivers feature an extra magnet in front of the driver to create a concentrated magnetic field that helps produce full, textured bass without distortion. Audio-Technica's specially designed Multiple-Transition Diaphragms add to the expansive bass response, as does the new Bass Venting System, which provides excellent air damping.

The ATH-CKS550BT wireless headphones feature a newly designed neckband that rests comfortably on the back of the neck and positions the in-line microphone, volume controls and music/video playback control in front of the neck for easy access. The headphones are equipped with Bluetooth® and NFC wireless technologies for quick pairing and automatic connection with the most recently paired device.

The headphones' internal lithium polymer rechargeable battery provides five hours of continuous use and up to 200 hours in standby mode. A 1.0 m (3.3') USB charging cable is included, as are four sizes (XS, S, M, L) of interchangeable silicone eartips that press onto the headphones' unique two-position posts, supplying a custom fit with outstanding sound isolation.

Features:

• Bluetooth wireless technology with in-line mic and controls for answering/ending calls, controlling music/video playback and adjusting volume
• 9.8 mm Dual Magnetic-Field Drivers with Multiple-Transition Diaphragms deliver superb bass
• Bass Venting System provides excellent air damping
• NFC (Near Field Communication) functionality enables touch pairing with NFC-compatible Bluetooth wireless technology devices
• Lightweight, ergonomic neck band with intuitive touch operation
• Internal battery provides five hours of continuous use (200 hours on standby) on a full charge
• Remembers up to eight previously paired devices and automatically connects with the last paired device
• Includes silicone eartips (XS/S/M/L) and 1.0 m (3.3') USB charging cable

Specifications:

• Type: Dynamic
• Driver Diameter: 9.8 mm
• Frequency Response: 5 – 24,000 Hz
• Sensitivity: 105 dB/mW
• Impedance: 16 ohms
• Battery: DC3.7 V lithium polymer rechargeable battery
• Battery Life: 5 hours continuous use (200 hours standby)
• Charging Time: Approx. 3 hours
• Weight: 32 g (1.1 oz)
• Accessories Included: 1.0 m (3.3') USB charging cable, eartips (XS, S, M, L)
• Type (Microphone): Condenser
• Sensitivity (Microphone): -44 dB (1V/Pa at 1 kHz)
• Frequency Response (Microphone): 50 – 4,000 Hz
• Polar Pattern (Microphone): Omnidirectional