This feature boosts productivity, reduces listener fatigue, and delivers high-fidelity audio from 220 Hz to 14 kHz. Please allow us the opportunity to resolve any issues before opening disputes and/or leaving feedback. If the item includes an ac power adapter for use, it will be 120 volts. Please ensure that this product is compatible with the standards within your country before purchasing.The item "Polycom 2200-15660-001 SoundStation IP 6000 Conference Corded VoIP Phone with AC" is in sale since Friday, May 17, 2019. This item is in the category "Business & Industrial\Office\Telecom Systems\Business Phone Sets & Handsets". The seller is "pricebreak-deals" and is located in United States. This item can be shipped to United States.