In depth comparison and review of Poly Voyager 4220 Office (UC Series) and EPOS I SENNHEISER ADAPT 135T USB-C II. Compare design, audio features, functions and other important specifications to easily choose the right headphones for you. Our goal is to help you uncover differences between the products and find the headphones that will best fit your needs.
| DESIGN AND DIMENSIONS | Poly Voyager 4220 Office (UC Series) | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Product Type | Headset - Bluetooth - wireless - USB-C | Headset - wired - 3.5 mm jack, USB-C | |
|---|---|---|---|
| Series | UC Series | ADAPT 100 Series | |
| Weight | 150 g | 145.3 g | EPOS I SENNHEISER ADAPT 135T USB-C II are lighter than Poly Voyager 4220 Office (UC Series) headphones. |
| Colour | - | Black | |
| Earpad Material | - | Leatherette | |
| Recommended Use | - | Portable electronics, computer | |
| Bluetooth Range (Operating Distance) | 30 m | - |
| SOUND QUALITY | Poly Voyager 4220 Office (UC Series) | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Headphones Form Factor | On-ear | On-ear | |
|---|---|---|---|
| Headphones Technology | - | Dynamic | |
| Connectivity Technology | Wireless | Wired | |
| Wireless Technology | Bluetooth | - | |
| Bluetooth Version | Bluetooth 4.1 | - | |
| Bluetooth Profiles | Hands-Free Profile (HFP), Headset Profile (HSP), Advanced Audio Distribution Profile (A2DP), Audio/Video Remote Control Profile (AVRCP) | - | |
| Sound Output Mode | Stereo | Stereo | |
| Sound Effects | - | EPOS Voice | |
| Frequency Response | 20 - 20000 Hz | 20 - 20000 Hz | Both headphones offer the same frequency response. |
| Sensitivity | 94 dB | - | |
| Impedance | 32 Ohm | - | |
| Max Sound Pressure | - | 115 dB | |
| Diaphragm | 32 mm | - | |
| Magnet Material | - | Neodymium | |
| Features | SoundGuard Technology | - | |
| In-Cord Volume Control | - | Yes |
| MICROPHONE | Poly Voyager 4220 Office (UC Series) | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Type | Boom | Boom | |
|---|---|---|---|
| Microphone Operation Mode | Uni-directional | Mono | |
| Noise Cancelling | - | Yes | EPOS I SENNHEISER ADAPT 135T USB-C II microphone can cancel out ambient noise. |
| Frequency Response | - | 100 - 8000 Hz | |
| Microphones Included | 2 | - |
| REMOTE CONTROL | Poly Voyager 4220 Office (UC Series) | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Controls | Mute, volume, answer/end, play/pause, next/previous track | Volume, answer/end |
|---|
| CABLE | Poly Voyager 4220 Office (UC Series) | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Cable Type | - | Headset cable |
|---|
| FEATURES | Poly Voyager 4220 Office (UC Series) | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Features | Voice alerts | EPOS ActiveGard |
|---|
| BATTERY AND CHARGING | Poly Voyager 4220 Office (UC Series) | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Battery Type | Headset battery rechargeable - lithium polymer | - | |
|---|---|---|---|
| Battery Capacity | 360 mAh | - | |
| Battery Life | 12 hour(s) | - | |
| Battery Life Details | Continuous playback: up to 15 hours Continuous talk: up to 12 hours |
- | |
| Standby Time | 312 hours | - | |
| Charging Time | 1.5 hour(s) | - |
| CONNECTIONS | Poly Voyager 4220 Office (UC Series) | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Connector Type | - | Headset (USB Type-C) Headset (mini-phone 3.5mm) |
|---|
| OTHERS | Poly Voyager 4220 Office (UC Series) | EPOS I SENNHEISER ADAPT 135T USB-C II |
|---|
| Included Accessories | Wireless headset system base, Bluetooth USB-C adapter | - | |
|---|---|---|---|
| Software Certification | - | Certified for Microsoft Teams, Optimised for UC | |
| Service & Support | - | Limited warranty - 2 years |
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