- Impedance 18 Ω ,Frequency response (Microphone) 100 - 10,000 Hz ,Frequency response 18 - 22,000 Hz
- Sound pressure level (SPL) 113dB (Passive: 1kHz/1Vrms),THD, total harmonic distortion <0.5% (1kHz/100dB)
- Pick-up pattern Dual omnidirectional microphones,Battery Specification Li-ion Polymer Battery,Codecs AptX
- Elegantly minimalistic – using tough, high-quality materials: That is how the HD 4.40 BT was designed. Its sleek frame not only makes it more comfortable to wear, it also makes a statement of The HD 4.40 BT is about freedom of movement. Thus, no cable. Instead you get the latest wireless technology and audio codec with Bluetooth 4.0 and aptX for reliable transmission and true wireless Hi-Fi sound. While Near Field Communication (NFC) ensures immediate and simple pairing with compatible devices.
- Want to take or make a call, change a track, adjust the volume? With the intuitive ear-cup mounted controls and the integrated microphones of the HD 4.40 BT all this is actually fun. Have a try.