Headphone SONY WH-ULT900N ULT Wear Wireless Bluetooth Noise Cancelling - Headset WH-ULT900N/B - Black Specifications - Size & Weight Approx. 255 g - Headphone Type Closed Dynamic - Input(S) Stereo Mini Jack - Direction Of Microphone All Direction - Cord Lenght Approx. 1.2 m - Frequency Response (BLUETOOTH® COMMUNICATION) 20 Hz - 20 000 Hz (Sampling frequency 44.1 kHz) - Ambient Sound Mode Yes - Magnet Neodymium - Unit Of Microphone : Electret Condenser Microphone - Impedance (OHM) 314 ohms (1 kHz) (when connecting via the headphone cable with the unit turned on) , 32 ohms (1 kHz) (when connecting via the headphone cable with the unit turned off) - Plug Gold-plated L-shaped stereo mini plug - Passive Operation Yes - Frequency Response 5 Hz - 20 000 Hz (JEITA) - ULT Button Yes - DSEE Yes - CORD TYPE Single-sided (detachable) - Driver Unit 40mm (Dome Type) - Wearing Style Over-Ear - Frequency Response (Active Operation) 5 Hz - 20 000 Hz (JEITA) - Sensitivities (DB/MW) 110 dB / mW (when connecting via the headphone cable with the unit turned on) , 100 dB / mW (when connecting via the headphone cable with the unit turned off) - Battery Battery Charge Time Approx. 3.5 hrs - Battery Charge Method USB - Battery Life (Continuous Music Playback Time) Max. 30 hrs (NC ON) , Max. 50 hrs (NC OFF) - Battery Life (Continuous Communication Time) Max. 30 hrs (NC ON) , Max. 40 hrs (NC OFF) - Bluetooth® Specification SUPPORTED AUDIO FORMAT(S) SBC, AAC - Frequency Range 2.4 GHz band (2.400 0 GHz - 2.483 5 GHz) - Bluetooth® Version Specification Version 5.2 1 - Supported Content Protection SCMS-T - Effective Range Approx. 10 m - Profile A2DP, AVRCP, HFP, HSP - Noise Cancelling AMBIENT SOUND MODE Yes