Design
| Has stereo speakers i | ✖ |
| Release date i | 2020 (1 other) |
| Can be folded i | ✖ |
| Has an open back design i | ✖ |
Sound quality
| Has active noise cancellation (anc) i | ✖ |
| Has passive noise reduction i | ✔ (12 others) |
| Lowest frequency i | 20 Hz (8 others) |
| Has a neodymium magnet i | ✖ |
| Highest frequency i | 20000 Hz (8 others) |
Microphone
| Has a noise canceling microphone i | ✔ (49 others) |
| Number of microphones i | 2 (24 others) |
| Has a removable microphone i | ✖ |
Power
| Battery Life i | 24 hours |
| Has a rechargeable battery i | ✔ (73 others) |
| Has a battery level indicator i | ✔ (49 others) |
| Charge time i | 2 hours (7 others) |
Connectivity
| Can Be Used Wirelessly i | ✔ (71 others) |
| Bluetooth Version i | 5 (7 others) |
| Maximum bluetooth range i | 10 m (47 others) |
| Has a 3.5mm male connector i | ✖ |
| Supports bluetooth pairing using nfc i | ✖ |
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Frequently Asked Questions
What is the battery life of the Coumi BT-857S?
At 24 hours, the Coumi BT-857S ranks #1 out of 16 — see ranking headset mobile phone products — one of the Highest battery life in this category, 210% above the category average.
What is the highest frequency of the Coumi BT-857S?
At 20000 Hz, the Coumi BT-857S is 27% above the category average for highest frequency, ranking #4 out of 21 — see ranking headset mobile phone products.
How long does the Coumi BT-857S take to charge?
At 2 hours, the Coumi BT-857S is 16% above the category average for charge time, ranking #5 out of 12 — see ranking headset mobile phone products.
What is the lowest frequency of the Coumi BT-857S?
At 20 Hz, the Coumi BT-857S is 75% below the category average for lowest frequency, ranking #9 out of 21 — see ranking headset mobile phone products.
What is the maximum bluetooth range of the Coumi BT-857S?
At 10 m, the Coumi BT-857S is 75% below the category average for maximum bluetooth range, ranking #15 out of 66 — see ranking headset mobile phone products.
Does the Coumi BT-857S have stereo speakers?
No, the Coumi BT-857S does not have stereo speakers. This feature is available in 43% of headset mobile phones.
How does it compare?
How does the Coumi BT-857S's maximum bluetooth range compare to similar headset mobile phoness?
At 10 m, the Coumi BT-857S trails the Jabra Engage 75 Stereo/Mono (150 m) by 93%.
How does the Coumi BT-857S's lowest frequency compare to similar headset mobile phoness?
At 20 Hz, the Coumi BT-857S trails the Jabra Talk 30 (200 Hz) by 90%.
How does the Coumi BT-857S's battery life compare to similar headset mobile phoness?
At 24 hours, the Coumi BT-857S leads the Jabra Talk 30 (5 hours) by 79%.
How does the Coumi BT-857S's highest frequency compare to similar headset mobile phoness?
At 20000 Hz, the Coumi BT-857S leads the Jabra Talk 30 (7000 Hz) by 65%.
How does the Coumi BT-857S's charge time compare to similar headset mobile phoness?
At 2 hours, the Coumi BT-857S trails the Jabra Engage 75 Stereo/Mono (1.5 hours) by 25%.