The Sennheiser ADAPT 100 Mono, USB-A and 3.5mm, is a wired mono headset designed primarily for professionals and users who frequently make phone calls both in the office and at home. It is intended for those who need clear communication and the ability to work effectively in noisy environments, while still remaining aware of what is happening around them.

This headset model allows for unilateral use – on one ear only – which means that the user is simultaneously connected to what is happening around them during a call or conference. This makes them particularly suitable for teamwork, receiving visitors or working at the reception desk, where complete isolation is not practical.

Evaluation of key product features

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The headphones work via a cable – either a USB-A interface or a classic 3.5 mm jack – so they can be used with a variety of devices, such as laptops, desktops, tablets, or even mobile phones with a corresponding input. The wired connection ensures stable operation without lags and without worrying about power or charging.

The built-in microphone with noise-canceling switch uses EPOS Voice technology to improve intelligibility and reduce background noise. This is especially useful when working in open offices, busy home environments, or during conference calls where focus is important. Although the model does not include active noise cancellation (ANC), the combination of a good microphone and a one-sided fit allows for a balance between following the conversation and what is happening in the room.

The emphasis on a one-sided (mono) fit is an advantage for users who need to remain in contact with colleagues or live customers while speaking. The comfortable ear cushions and lightweight design allow for long-term wear, contributing to less fatigue during hours of conversation.

The headset is designed primarily for calls, online meetings, distance learning, and everyday office work, where the user needs quality communication, flexible connectivity, and basic protection against background noise.

• Mono headphones with USB-A
• Microphone frequency range: 100 - 8000 Hz
• Speaker frequency response: 20 - 20,000 Hz
• Sound pressure: 115 dB
• Speaker type: Dynamic neodymium magnet
• Microphone and headphones with noise-canceling switch
• The following buttons are included: answer calls, volume control, mute function
• Product with EPOS Voice technology
• Noise limiter at work (EU regulation): protecting users from possible acoustic shocks caused by unforeseen sound peaks
• Connectivity: USB-A and 3.5mm jack
• Easy connection: Plug & Play
• Headphone weight: 106.6 g

It is important to know

When deciding on a mono wired headset for phone calls, it is crucial to understand how the choice of one-sided fit, connectivity and microphone affect the everyday experience, especially in work environments. Buyers often overlook the practical implications that can arise from this design – so the step before purchasing means weighing up the freedom from ambient noise and the limitations of one-sided listening.

• The mono design allows for better perception of the surroundings during calls, but this also means that they are less suitable for in-depth listening to music or noise isolation.
• A wired connection via USB-A and 3.5mm cable provides a stable connection without additional charging, but limits movement away from the device.
• A built-in microphone is an advantage for clear calls and video conferencing, especially if you mostly work on a computer or phone.
• Practical switching between USB and 3.5 mm connector means wider compatibility with different devices, but at the same time means that functionalities such as active noise cancellation (ANC) are not present.

Source of editorial recommendations: ENAA guides and team experience.

In practice

🟢 Calls and video conferences

Very convenient – The mono design and built-in microphone allow for clear communication during phone calls and video meetings, especially in less noisy environments.

🟡 Listening to music

Suitable with limitations – Listening to music is possible, but the mono performance and open design limit the immersive experience and depth of sound.

🟢 Use in the office or home office

Very convenient – The wired connection means you don't have to worry about the battery, and the one-sided design means you can always hear what's going on around you.

🔴 Loud or noisy environment

Less suitable – Without noise-canceling features, the experience in open, noisy spaces is limited as the mono design does not isolate sound.

Answers to frequently asked questions

Can I connect these headphones to my computer and phone at the same time?

The headphones can be used via USB-A or a 3.5 mm connector, but simultaneous connection to two devices is not possible.

Is the microphone good enough for professional video calls?

Yes, the built-in microphone provides clear voice capture, which is sufficient for most business calls and video conferences.

How long is the flexibility of movement due to the wired connection?

A wired connection limits your movement based on the length of the cable; you'll have the most freedom if you work in close proximity to the connected devices.

Do the headphones also work with mobile phones?

Yes, with a 3.5mm jack, you can use them with compatible smartphones and tablets that have this input.

Description updated: August 2026

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