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(OTS-3)
- Power-saving design, long-time operation
- Articulate voice, low background noise
- Judgmatical calling function
- 32 steps volume control
- Low-power alarm
- Maximum dynamic range 40dB@1550nm for long distance communication
(OTS-4)
- Two pairs of OTS-4 supports tri-party communication via clip-on coupler device
- Hands-free (HF) speaker provides users with convenient operation
- Maximum dynamic range 50dB@1550nm for long distance communication
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