USA 
HD 400S Over-Ear Headphones
Product Description
The HD 400S Around-Ear Headphones from Sennheiser features a one-button smart remote conveniently located on the cable that allows you to control music and take telephone calls on smartphones, tablets, MP3 players, and audio recorders. The sturdy folding design makes these headphones durable and compact enough to be taken anywhere. The dynamic drivers deliver a well-extended sound response with dynamic bass. The included detachable cable with a one-button remote terminates with a right angled 3.5mm mini-jack.
| Headphone | |
| Driver Type | Dynamic |
| Design | Over-Ear (Circumaural) |
| Earcup Style | Closed-Back |
| General | |
| Frequency Response | 18 Hz to 20 kHz |
| Sensitivity | 120 dB at 1 kHz / 1 mW |
| Impedance | 18 Ohms |
| Maximum Sound Pressure Level (SPL) | 120 dB at 1 kHz / 1 Vrms |
| Total Harmonic Distortion (THD) | 0.5% |
| Active Noise Cancellation | No |
| Foldable | Yes |
| Output Power | |
| Microphone | |
| Type | Dynamic |
| Pickup Pattern | Omnidirectional |
| Frequency Response | 100 Hz to 10 kHz |
| Sensitivity | -44 dB |
| Connectivity | |
| Audio Connector to Source | 1/8" / 3.5 mm TRRS Right-Angled |
| Cable | |
| Cable Design | Single-Sided |
| Detachable | Yes |
| In-Line Remote/Microphone | Yes |
| Full Remote OS Support | Android, iOS |
| Cable Length | 55.12" / 1.4 m |
| Physical | |
| Certifications | |
| Weight | 7.65 oz / 217 g with Cable |
| Warranty Length | Limited 2-Year Warranty |