SONY WH-CH710N Black Wireless Noise-Canceling Headphones / WH CH710N / WHCH710N Flawless audio without interruption The WH-CH710N Wireless Noise-Canceling Headphones offer powerful, distraction-free listening wherever you are. With Noise Canceling via Dual Noise Sensor Technology, as well as Ambient Sound mode, you can take control of what you hear—and with up to 35 hours of wireless playback, you can listen to music all day long. - Take control of what you hear with Dual Noise Sensor Technology - NFC™ One-touch for instant music - Quality streaming via Bluetooth® - Quick charging - Travel easily with swivel design - Hands-free help from your assistant - Clearer hands-free calling - Never miss a beat with 1.2 " (30 mm) drivers General Features HEADPHONE TYPE: Closed, Dynamic DRIVER UNIT: 30 mm, Dome IMPEDANCE (OHM):72 ohm (when connecting via the headphone cable with the unit turned on), 33 ohm (at 1 kHz) (when connecting via the headphone cable with the unit turned off) FREQUENCY RESPONSE:7 Hz–20,000 Hz (JEITA) FREQUENCY RESPONSE (ACTIVE OPERATION):20 Hz–20,000 Hz (POWER ON) (Wired) FREQUENCY RESPONSE (BLUETOOTH® COMMUNICATION):20 Hz–20,000 Hz (44.1 kHz Sampling) VOLUME CONTROL: Yes CORD TYPE: Detachable Single-sided type: CORD LENGTH: Approx. 47.25 inch (supplied headphone cable): PLUG L-shaped stereo mini plug (supplied headphone cable): INPUT(S) Stereo Mini Jack: NFC Yes: PASSIVE OPERATION Yes: Battery BATTERY CHARGE METHOD: USB BATTERY LIFE (CONTINUOUS MUSIC PLAYBACK TIME): Max 35 hrs (BT NC) BATTERY LIFE (CONTINUOUS COMMUNICATION TIME): Max 35 hrs (BT NC) BATTERY LIFE (WAITING TIME): Max. 200 hrs (BT: ON/Noise Canceling: OFF) Bluetooth® Specification BLUETOOTH® VERSION: Version 5.0 EFFECTIVE RANGE: Line of sight approx. 30 ft (10 m) FREQUENCY RANGE: 2.4 GHz band (2.4000–2.4835 GHz) PROFILE: A2DP, AVRCP, HFP, HSP SUPPORTED AUDIO FORMAT(S): AAC, SBC SUPPORTED CONTENT PROTECTION: SCMS-T Noise Canceling NOISE CANCELING ON/OFF SWITCH: Yes AUTOMATIC AI NOISE CANCELING: Yes