User Guide

HD 4.50BTNC | 33
Specifications
Specifications
HD 4.50BTNC
Ear coupling closed, circumaural
Frequency response 18 - 22,000 Hz
Transducer principle dynamic
Sensitivity (microphone) 100 - 10,000 Hz
Sound pressure level (SPL) 113 dB (1 kHz/ 1 V
rms
)
THD (1 kHz, 100 dB) < 0.5 %
Pick-up pattern dual omni-directional microphones
Noise compensation NoiseGard™ active noise cancellation
Input power 3.7 VDC, 600 mAh: built-in rechargeable
Lithium-Polymer battery
5 VDC, 400 mA: USB charging
Operating time 19 hours (Bluetooth and NoiseGard on)
25 hours (Bluetooth only)
Charging time approx. 2 hours
Weight approx. 238 g
Battery Lithium Polymer
Connectivity Bluetooth version 4.0/NFC pairing
Audio cable
(optional/detachable)
1.4 m audio cable, 3.5 mm angled plug,
gold-plated
Connector USB charging cable