Sennheiser HD 450BT Noise-Canceling Wireless Over-Ear Headphones (White) - Manual (Page 31)

Specifications
HD 450BT | 31
Specifications
Model: SEBT4
Bluetooth
Wearing style Bluetooth® around-ear
Ear coupling circum-aural
Transducer principle dynamic, closed-back
Transducer 32 mm
Frequency response 18 Hz to 22,000 Hz (-10 dB)
Sound pressure level (SPL) 108 dB (1 kHz/0 dBFS)
THD (1 kHz, 100 dB SPL) < 0.3 % (1 kHz, 100 dB SPL)
Microphone principle MEMS
Microphone frequency
response 80 Hz to 6,000 Hz (-3 dB)
Microphone pick-up pattern
(speech audio) dual omni-directional microphones
2-mic beamforming array
Power supply built-in rechargeable lithium-polymer
battery: 3.7 V
⎓ , 600 mAh
USB charging: 5 V ⎓ , 500 mA max.
Charging time of
rechargeable battery approx. 2 hours
Operating time 30 hrs (music playback via Bluetooth
with ANC activated)
Temperature range operation: 0°C to +40°C
charging: +10°C to +40°C
storage: –20°C to +60 °C
Relative humidity operation: 10 to 80%, non condensing
storage: 10 to 90%
Weight (headphones) approx. 238 g
Magnetic field strength 1.9 mT
Version Bluetooth 5.0 compatible, class 1, BLE
Transmission frequency 2,402 MHz to 2,480 MHz
Modulation GFSK, π /4 DQPSK, 8DPSK
Output power 12.6 mW (max)
Profiles HSP, HFP, AVRCP, A2DP
Codec aptX, aptX LL, AAC, SBC