Sony MDR-ZX780DC Bluetooth Wireless Noise Canceling Stereo Headphones

• General Features:
• Color: Black
• Over-ear Wireless Headset
• Rotating earcups
• Bluetooth v3.0 wireless technology
• Bluetooth audio streaming
• Digital Noise Canceling technology
• AAC and aptX codecs support for better sound quality
• Built-in microphone for hands-free phone calling
• Passive mode for normal operation without battery usage
• Use with included 3.5mm Audio cable when battery is exhausted
• One touch NFC (Near Field Communication) support 
• Specifications:
• Output: Bluetooth Specification Power Class 2
• Maximum communication range: Line of sight approx. 10m  (30 ft)
• Frequency band: 2.4 GHz band (2.4000 GHz - 2.4835 GHz)
• Modulation method: FHSS
• Compatible Bluetooth profiles: A2DP (Advanced Audio Distribution Profile)
• AVRCP (Audio Video Remote Control Profile)
• HFP (Hands-free Profile)
• HSP (Headset Profile)
• Supported Codec: SBC, AAC, aptX
• Supported content protection method: SCMS-T
• Transmission range (A2DP): 20 Hz - 20,000 Hz (Sampling frequency 44.1 kHz) 
• Receiver:
• Type: Closed, Dynamic
• Driver units: 40 mm
• Frequency response: 8 Hz - 22,000 Hz (when using the headphone cable)
• Maximum input: 100 mW (when using the headphone cable)
• Impedance: NC ON: 23 O (1 kHz) (when using the headphone cable)
• NC OFF: 50 O (1 kHz) (when using the headphone cable)
• Sensitivity: NC ON: 98 dB/mW (when using the headphone cable)
• NC OFF: 100 dB/mW (when using the headphone cable)
• Microphone:
• Type: Electret condenser
• Directivity: Omni directional
• Effective frequency range: 100 Hz - 10,000 Hz 
• Power source:
• DC 3.7V: Built-in lithium-ion rechargeable battery

• DC 5V: When charged using USB
• Usage hours (when connecting via the Bluetooth device): Music playback time: Max. 13 hours (NC ON), Max. 19 hours (NC OFF)
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• Communication time: Max. 10 hours (NC ON), Max. 12 hours (NC OFF)
• Standby time: Max. 26 hours (NC ON), Max. 150 hours (NC OFF)
• Usage hours (when connecting via the headphone cable): Max. 24 hours (NC ON) Usage hours may be shorter depending on the Codec and the conditions of use.
• Charging Time: Approx. 2.5 hours, Charging hours may be different depending on the conditions of use.
• Power Adapter Specification:
• Input: 100-240V, 0.2A, 50/60Hz
• Output: 5V, 1.5A 
• Dimensions:
• 7.5 x 7 x 3.2-inches (H x W x D, approximate)