SPECS
| Model Number: | S661 | Frequency response: | 20Hz - 20kHz | |
| Bone conduction technology: | 7th generation of | Sweat/Water resistance: | IP55 | |
| Chip: | QCC3024 | Weight: | 29g | |
| Bluetooth® version: | Bluetooth® v5.0 | Battery: | Rechargeable Li-Polymer battery | |
| Compatible profiles: | HSP, HFP, A2DP, AVRCP | Battery capacity: | 135 mAh | |
| Frequency band: | 2402 - 2480MHz | Continuous play: | Up to 6 hours | |
| Maximum RF output power: | 4dBm | Standby time: | Up to 10 days | |
| Wireless range: | 33 ft (10m) | Charge voltage: | 5.25V ± 5% | |
| Speaker impedance: | 8.0 ± 0.5ohm | Charge time: | 2 hours | |
| Speaker sensitivity: | 96 ± 3dB | Charge type: | USB-C | |
| Microphone sensitivity | -40 ± 2dB | Warranty: | 2 years |
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