SENNHEISER Headset MM400 BT
| Wearing style | Supra-aural |
| Transducer principle | Closed acoustics |
| Technology | Bluetooth® 2.1 + EDR / supported profiles: A2DP + AVRCP + HSP + HFP |
| Talk time | 20 h |
| Listening time | 10 h |
| Charging time | 3 h |
| Range | 10 m |
| Weight | 105 g |
| Headphone | |
| Frequency response | 15 – 22.000 Hz |
| THD, total harmonic distortion | Less than 0.1% at 1 KHz |
| Sound pressure level (SPL) | 107 dB |
| Microphone | |
| Frequency response | 100 – 10.000 Hz |
| Pick-up pattern | omni-directional |