Polycom SoundPoint IP320 IP321 IP330 IP331 IP335. (5)UL Safety Certificates ; Energy Star Efficiency Level VI ; FCC Certified. Output: DC Barrel tip. Input: AC 100V - 240V 50-60Hz. (4) Current Overload Cut-off | Automatic Thermal | Short Circuit Protection | High Efficiency | Low fever & No Noise | Long Lifespan.
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