Never used Polycom PSA15A-480P AC Power Adapter for VVX 300, 400, and 500 phones. This genuine Polycom product is designed to provide reliable power and is the perfect replacement for a lost or damaged adapter. Compatible with a range of VoIP business phones and IP PBX systems, this adapter is an essential accessory for any enterprise networking setup. Buy with confidence knowing that you are getting a high-quality product from a trusted brand.